飞羽的博客

UIStepper(Objc)

飞羽

Objective-C

发布于：2017年3月27日

UIStepper


#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
//    初始化并设置frame
    UIStepper *stepper = [[UIStepper alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
//    最小值
    stepper.minimumValue = 0;
    
//    最大值
    stepper.maximumValue = 10;
//    设置当前值
    stepper.value = 4;
//    设置每次+2或-2，默认是1
    stepper.stepValue = 2;
    
//    设置颜色
    [stepper setTintColor:[UIColor orangeColor]];
//    添加事件
    [stepper addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];
    
//    处理事件是否一直回调，默认是YES
    stepper.continuous = YES;
    
//    设置能否重复操作，默认是YES
    stepper.autorepeat = YES;
    
//    设置是否能循环，默认是NO
    stepper.wraps = YES;
    
    [self.view addSubview:stepper];
}
-(void)valueChange:(UIStepper*)stepper{
    NSLog(@"%lf",stepper.value);
}
@end

UISlider(Objc)

飞羽

Objective-C

发布于：2017年3月25日

UISlider


#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
//    slider高度是固定的
    UISlider *slider = [[UISlider alloc]initWithFrame:CGRectMake(100, 100, 200, 30)];
    slider.tag = 10;
//    最小值
    slider.minimumValue = 0;
//    最大值
    slider.maximumValue = 255;
//    设置当前值
    slider.value = 200;
    
//    未滑动到的颜色
    slider.maximumTrackTintColor = [UIColor greenColor];
//    已经滑动过的颜色
    slider.minimumTrackTintColor = [UIColor orangeColor];
//    小球（滑块）颜色
    slider.thumbTintColor = [UIColor blackColor];
//    设置图片
//    最左端图片
    slider.minimumValueImage = [UIImage imageNamed:@"blackHeart"];
//   最右端图片
    slider.maximumValueImage = [UIImage imageNamed:@"redHeart"];
//    设置滑块正常状态下的图片
    [slider setThumbImage:[UIImage imageNamed:@"blackHeart"] forState:UIControlStateNormal];
//    设置滑块高亮状态下的图片
    [slider setThumbImage:[UIImage imageNamed:@"redHeart"] forState:UIControlStateHighlighted];
    
    [slider addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:slider];
    
    UISlider *greenSlider = [[UISlider alloc]initWithFrame:CGRectMake(100, 200, 200, 80)];
    greenSlider.tag = 11;
    greenSlider.minimumValue = 0;
    greenSlider.maximumValue = 255;
    [greenSlider addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];
    
    [self.view addSubview:greenSlider];
    
    UISlider *blueSlider = [[UISlider alloc]initWithFrame:CGRectMake(100, 300, 200, 100)];
    blueSlider.tag = 12;
    blueSlider.minimumValue = 0;
    blueSlider.maximumValue = 255;
    [blueSlider addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:blueSlider];
}
-(void)valueChange:(UISlider*)slider{
    NSLog(@"---%lf",slider.value);
    UISlider *redSlider = (UISlider *)[self.view viewWithTag:10];
    UISlider *greenSlider = (UISlider *)[self.view viewWithTag:11];
    UISlider *blueSlider = (UISlider *)[self.view viewWithTag:12];
    
    [self.view setBackgroundColor:[UIColor colorWithRed:redSlider.value/255.0 green:greenSlider.value/255.0 blue:blueSlider.value/255.0 alpha:1.0]];
    

}

@end

UIsegementControl(Objc)

飞羽

Objective-C

发布于：2017年3月21日

UIsegementControl

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
//    初始化UISegmentedControl
    UISegmentedControl *segmentControl = [[UISegmentedControl alloc]initWithFrame:CGRectMake(100, 100, 200, 50)];
//    设置背景色
    segmentControl.backgroundColor = [UIColor yellowColor];
//    添加第一段
    [segmentControl insertSegmentWithTitle:@"第一段" atIndex:0 animated:YES];
//    添加第二段
    [segmentControl insertSegmentWithTitle:@"第二段" atIndex:1 animated:YES];
//    添加第三段
//    设置文字和图片，谁在后面，显示谁
    [segmentControl insertSegmentWithTitle:@"第三段" atIndex:2 animated:YES];
    
    UIImage *image = [UIImage imageNamed:@"qq"];
//    显示原始图片
    image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
//    [segmentControl insertSegmentWithImage: image atIndex:2 animated:YES];
    [segmentControl setImage:image forSegmentAtIndex:2];
    
 
//    选中颜色
    segmentControl.tintColor = [UIColor redColor];
//    设置选中某一段
    segmentControl.selectedSegmentIndex = 1;
    
//    获取某一段的title
    NSString *title = [segmentControl titleForSegmentAtIndex:1];
    NSLog(@"title = %@",title);
//    添加响应事件
    [segmentControl addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];
    
    [self.view addSubview:segmentControl];
    
}
-(void)valueChange:(UISegmentedControl*)seg{

    NSInteger index = seg.selectedSegmentIndex;
    switch (index) {
        case 0:{
            NSLog(@"0");
            
            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"还钱" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"不还", nil];
            [alert show];
        }
            break;
        case 1:
            NSLog(@"1");
            break;
        case 2:
            NSLog(@"2");
            break;
            
        default:
            break;
    }
}

@end

Transform形变(Objc)

飞羽

Objective-C

发布于：2017年3月19日

Transform形变

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
//    [self transform];
    [self lastTransform];
}
#
-(void)lastTransform{
    UIView *changeView = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    changeView.tag = 20;
    changeView.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:changeView];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(50, 50, 50, 50);
    button.backgroundColor = [UIColor blueColor];
    [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
}
-(void)onClick{
    
//     仿射变化
//    通过center bounds transform来控制要显示的内容
    UIView *changeView = [self.view viewWithTag:20];
//    在上次形变的基础上，继续形变
    changeView.transform = CGAffineTransformTranslate(changeView.transform, 10, 0);
    
//    旋转
   CGFloat angle = [self getAgreeFromDegree:10];
    changeView.transform = CGAffineTransformRotate(changeView.transform, angle);

//    缩放
//    changeView.transform = CGAffineTransformScale(changeView.transform, 0.9, 1.0);
    NSLog(@"%@",NSStringFromCGRect(changeView.frame));
    NSLog(@"%f",changeView.bounds.size.width);
    NSLog(@"%f",changeView.bounds.size.height);
    NSLog(@"%f",changeView.center.x);
    NSLog(@"%f",changeView.center.y);
    
}
#pragma mark -
#pragma mark 形变
//形变
-(void)transform{
    UIView *changeView = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    
    UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 10, 10)];
    [view1 setBackgroundColor:[UIColor blueColor]];
    [changeView addSubview:view1];
   
    changeView.backgroundColor = [UIColor yellowColor];
    
//    平移
    changeView.transform = CGAffineTransformMakeTranslation(0, 100);
//    缩放
//    changeView.transform = CGAffineTransformMakeScale(0.5, 1.0);

//    旋转
//    传入的值为正值时，顺时针转动
    CGFloat angle = [self getAgreeFromDegree:20];
    changeView.transform = CGAffineTransformMakeRotation(angle);
    
    [self.view addSubview:changeView];
}
-(CGFloat)getAgreeFromDegree:(CGFloat)degree{
    CGFloat agree = degree * M_PI / 180;
    return agree;
}
//创建一个UIView
-(void)createUIView{
//    初始化UIView
    UIView *orangeView = [[UIView alloc]init];
//    设置背景色
    orangeView.backgroundColor = [UIColor orangeColor];
//    设置frame
    orangeView.frame = CGRectMake(0, 0, 100, 100);
//    设置center
    orangeView.center = CGPointMake(0, 0);
    orangeView.center = self.view.center;
    
//    添加到视图
    [self.view addSubview:orangeView];
}

@end

UIActionSheet(Objc)

飞羽

Objective-C

发布于：2017年3月19日

UIActionSheet

#import "ViewController.h"

@interface ViewController ()<UIActionSheetDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
//    初始化
    UIActionSheet *sheet = [[UIActionSheet alloc]initWithTitle:@"分享" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"删除" otherButtonTitles:@"微博分享",@"微信分享",@"QQ分享", nil];
//    显示在指定的view上
    [sheet showInView:self.view];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
//    在这里做事件处理
    switch (buttonIndex) {
        case 0:
            NSLog(@"%ld",buttonIndex);
            break;
        case 1:
            NSLog(@"%ld",buttonIndex);
            break;
        case 2:
            NSLog(@"%ld",buttonIndex);
            break;
        case 3:
            NSLog(@"%ld",buttonIndex);
            break;
        case 4:
            NSLog(@"%ld",buttonIndex);
            break;
            
            
        default:
            break;
    }
}
@end

Touch(Objc)

飞羽

Objective-C

发布于：2017年3月14日

Touch

#import "ViewController.h"

@interface ViewController ()
{
    UIView *myview;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
//    初始化myview
    myview = [[UIView alloc]initWithFrame:CGRectMake(100,100, 100, 100)];
//    设置背景色
    myview.backgroundColor = [UIColor lightGrayColor];
//    添加到视图上
    [self.view addSubview:myview];
    
}
//开始触摸，只调用一次
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"touch began");
}
//开始移动，会多次调用
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"----");
//    UITouch
//    用来保存跟手指相关的信息，比如：触摸的位置
//    当手指移动时，系统会更新同一个UIToch对象，使之能够一直保存该手指在的触摸位置
//    当手指离开屏幕时，系统会销毁对应的UITouch对象
//
//    从touches中取出手指
    UITouch *touch = [touches anyObject];
    
    if (touch.view == myview) {
        
        //    该方法记录了前一个触摸点的位置
        CGPoint previousPoint = [touch previousLocationInView:self.view];
        
        /*
         返回值表示触摸在self.view上的位置
         这里的位置是针对self.view的坐标系（以self.view的左上角为原点（0,0））
         如果传nil时，返回的触摸点在UIWindow的位置
         */
        
        //    该方法记录了当前点的位置
        CGPoint currentPoint = [touch locationInView:self.view];
        
        NSLog(@"1------>%@",NSStringFromCGPoint(previousPoint));
        NSLog(@"2------>%@",NSStringFromCGPoint(currentPoint));
        //    获取x偏移量
        CGFloat x = currentPoint.x - previousPoint.x;
        //    获取y偏移量
        CGFloat y = currentPoint.y - previousPoint.y;
        
        //    获取myview中心点
        CGPoint center = myview.center;
        
        center.x += x;
        center.y += y;
        
        myview.center = center;
    }
}
//结束触摸，只调用一次
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"touch end");
}
//触摸取消（例如来电打断）
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
    
}
@end

UIScrollView(Objc)

飞羽

Objective-C

发布于：2017年3月9日

UIScrollView


#import "ViewController.h"

@interface ViewController ()<UIScrollViewDelegate>//遵守协议

{
//    滚动视图
    UIScrollView *_scrollView;
    
}

@property (weak, nonatomic) IBOutlet UIButton *myButton;
@end

@implementation ViewController

- (IBAction)onClick:(UIButton *)sender {
    [_scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self createScrollView];
    [self addSubView];
    [self customScrollView];
    
    [self.view bringSubviewToFront:self.myButton];
    
    /*
//    [self.myButton  addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    
    //-(void)onClick{
    //    NSLog(@"onClick");
    //}
     */
    
 
}


//创建ScrollView
-(void)createScrollView{
//    初始化UIScrollView
    _scrollView = [[UIScrollView alloc]initWithFrame:self.view.bounds];
    
//    _scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];
//    设置背景色
    _scrollView.backgroundColor = [UIColor orangeColor];
//    设置代理
    _scrollView.delegate = self;
    
    [self.view addSubview:_scrollView];
    
}
-(void)addSubView{
//    获取文件路径
    NSString *path = [[NSBundle mainBundle]pathForResource:@"海贼02" ofType:@"jpg"];
//    转换成NSData
    NSData *data = [NSData dataWithContentsOfFile:path];
//    初始化图片
    UIImage *image = [UIImage imageWithData:data];
//    图片初始化后，会直接获得图片的width 和 height
//    NSLog(@"width = %lf---height = %lf",image.size.width,image.size.height);

//     初始化UIImageView
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, image.size.width, image.size.height)];
    imageView.image = image;
    
//    设置滚动范围
//    必须给出滚动范围，这样滚动视图才能知道滚动的范围
    _scrollView.contentSize = CGSizeMake(image.size.width, image.size.height);
    
    
    [_scrollView addSubview:imageView];
}
// 定制ScrollView
-(void)customScrollView{
    
//    设置偏移量
//    [_scrollView setContentOffset:CGPointMake(200, 200)];

//    设置距离边框的距离
//    [_scrollView setContentInset:UIEdgeInsetsMake(100, 100, 100, 100)];
    
#pragma mark 滚动相关
    
//    设置是否可以超出边界
//    默认是YES，超出边界后，有回弹效果
//    设置NO，没有回弹效果
    _scrollView.bounces = YES;
    
//    在这里，想测试下面两个属性时，使用《海贼03.jpg》
//    当contentSize的宽度小于scrollView的宽度时，仍允许左右拖动，默认是NO
    _scrollView.alwaysBounceHorizontal = YES;
//    当contentSize的高度小于scrollView的高度时，仍允许上下手动，默认是NO
    _scrollView.alwaysBounceVertical = YES;
    
//    设置是否按页滚动，即每次滚动一个scrollView的宽度或高度，默认是NO
//    _scrollView.pagingEnabled = YES;
    
//    设置是否允许滚动，默认是YES
    _scrollView.scrollEnabled = YES;
    
//    设置是否显示滚动指示，默认是YES
    _scrollView.showsHorizontalScrollIndicator = YES;
    _scrollView.showsVerticalScrollIndicator = YES;
    
//    设置滚动指示的样式
    _scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
//    UIScrollViewIndicatorStyleDefault,
//    UIScrollViewIndicatorStyleBlack,
//    UIScrollViewIndicatorStyleWhite
    
//    设置滚动条距离scrollView边框的距离
    _scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, 30, 60);
    
    _scrollView.scrollsToTop = YES;
    
}
#pragma mark scrollView delegate
//将要拖拽
//当开始滚动视图时，会执行该方法
//一次有效的滑动执行一次（开始滑动到手指松开），
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
    NSLog(@"将要拖拽");
}
//scrollView滚动时，就会调用该方法
//任何offset值的改变都会调用该方法。在滚动过程中，会调用多次
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
 //   CGPoint point = scrollView.contentOffset;
//    NSLog(@"偏移量%lf",point.x);
}
-(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
    NSLog(@"将要结束拖拽");
}
//当手指离开屏幕的一瞬间，调用该方法，一次有效的滑动，只执行一次
-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
//    NSLog(@"%lf",scrollView.contentOffset.x);
    NSLog(@"拖拽结束");
//    [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}

//将要减速
//该方法在scrollViewDidEndDragging 结束后执行
-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
    NSLog(@"将要减速");
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    NSLog(@"减速结束");
    
//    [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}
@end

#pragma mark 缩放 delegate
//当将要开始缩放时，执行该方法。一次有效的缩放，执行一次
-(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
    NSLog(@"将要开始缩放");
}
//正在缩放
-(void)scrollViewDidZoom:(UIScrollView *)scrollView{
    NSLog(@"正在缩放");
    CGFloat value =  scrollView.zoomScale;
    NSLog(@"%f",value);
}
//结束缩放
-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale{
    NSLog(@"结束缩放");
}

//返回要缩放的UIView对象
-(UIView*)viewForZoomingInScrollView:(UIScrollView *)scrollView{
//  不允许返回scrollView
//  只能返回scrollView的子视图
    return scrollView.subviews[0];
}

//当用户点击状态栏后，滚动视图是否能够滚动到顶部
-(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
//    当设置scrollToTop 为YES时，这里设置YES才会生效
    return NO;
}
//当滚动视图滚动到最顶端的时候，会执行该方法
-(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
    NSLog(@"%s",__func__);
}

NavgationController细化(Objc)

飞羽

Objective-C

发布于：2017年3月8日

NavgationController细化

#import "AppDelegate.h"
#import "RootViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    //初始化window
    self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    //设置背景颜色
    self.window.backgroundColor = [UIColor whiteColor];
    //视图控制器
    RootViewController *rootVC = [[RootViewController alloc]init];
//    初始化导航控制器，并设置基栈
    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:rootVC];
    nav.view.backgroundColor = [UIColor redColor];
    
    
    //系统控制器设置为自创的
    self.window.rootViewController = nav;
    
    //让self.window 显示
    [self.window makeKeyAndVisible];
    
    return YES;
}

#import "RootViewController.h"
#import "SecondViewController.h"
@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    [self.view setBackgroundColor:[UIColor yellowColor]];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button setTitle:@"下一级" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    [self settingNavgationBar];
}
-(void)settingNavgationBar{
    
    UINavigationBar *bar = self.navigationController.navigationBar;
    
//    设置navigationBar 的类型
    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
//    UIBarStyleDefault
//    UIBarStyleBlack
    
//    透明度(毛玻璃)
    bar.translucent = YES;
//    设置yes，子视图的坐标原点是（0,0）
//    设置no,子视图的坐标原点是(0,64)
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];
    label.backgroundColor = [UIColor greenColor];
    [self.view addSubview:label];
    
//    设置导航条颜色
    [bar setBarTintColor:[UIColor redColor]];
    
//    设置标题
//    self.title = @"root";
    self.navigationItem.title = @"root";
    
//    导航条按钮字体颜色
    [bar setTintColor:[UIColor cyanColor]];
    
//    设置导航条字体颜色
    [bar setTitleTextAttributes:@{
                                 NSFontAttributeName:[UIFont systemFontOfSize:20],
                                 NSForegroundColorAttributeName:[UIColor purpleColor]
                                 }];
    
//    设置隐藏导航条
//    self.navigationController.navigationBarHidden = YES;
    
    [bar setBackgroundImage:[UIImage imageNamed:@"header_bg44"] forBarMetrics:UIBarMetricsDefault];
//    UIBarMetricsDefault 横竖屏都显示
//    UIBarMetricsCompact 竖屏显示
    
    
//    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:secondVc     action:@selector(abc)];
    
    UIImage *image = [UIImage imageNamed:@"qq.png"];
//    对图片进处理
   image =  [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
//    UIImageRenderingModeAutomatic,返回一个色块
//    UIImageRenderingModeAlwaysOriginal,返回图片本身       UIImageRenderingModeAlwaysTemplate,返回一个色块
    
//    UIBarButtonItemStylePlain,
//    UIBarButtonItemStyleDone,
    
//    leftBarButtonItem 左按钮
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithImage:image style:UIBarButtonItemStylePlain target:self     action:@selector(leftClick)];
//    rightBarButtonItem 右按钮
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"right" style:UIBarButtonItemStyleDone target:self action:@selector(rightClick)];
    
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithTitle:@"item1" style:UIBarButtonItemStylePlain target:self action:@selector(rightClick)];
    
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithTitle:@"item2" style:UIBarButtonItemStylePlain target:self action:@selector(rightClick)];
    

    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, 0, 40, 40);
    [button setBackgroundColor:[UIColor redColor]];
    
    [button setImage:image forState:UIControlStateNormal];
    
//    添加一个自定义的UIButton
    UIBarButtonItem * item3 = [[UIBarButtonItem alloc]initWithCustomView:button];
    
    //    设置rightBarButtonItems时，会把rightBarButtonItem 覆盖
    self.navigationItem.rightBarButtonItems = @[item1,item2,item3];
    
    UILabel *label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 44)];
    label1.backgroundColor = [UIColor redColor];
    label1.text = @"label";
    
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 40)];
    imageView.image = image;
//    设置titleView
    self.navigationItem.titleView = imageView;
    
}
-(void)leftClick{
    NSLog(@"---");
}
-(void)rightClick{
    NSLog(@"%s",__func__);
}
-(void)onClick{
    
    SecondViewController *secondVc = [[SecondViewController alloc]init];
//    进入下一级（入栈）
    [self.navigationController pushViewController:secondVc animated:YES];
    
    
}
@end


#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()

@end

@implementation SecondViewController
-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
//    视图将要出现的时候，隐藏navgationBar
        self.navigationController.navigationBarHidden = YES;
}
-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
//    视图将要消失的时候，显示navgationBar
    self.navigationController.navigationBarHidden = NO;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    

    
    [self.view setBackgroundColor:[UIColor greenColor]];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button setTitle:@"下一级" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
    button1.frame = CGRectMake(100, 200, 100, 50);
    [button1 setTitle:@"上一级" forState:UIControlStateNormal];
    button1.backgroundColor = [UIColor lightGrayColor];
    [button1 addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button1];
}

-(void)abc{
    NSLog(@"----");
}
-(void)backClick{
//    返回上一级
    [self.navigationController popViewControllerAnimated:YES];
}
-(void)onClick{
    ThirdViewController *thirdVc = [[ThirdViewController alloc]init];
//    进入下一级（入栈）
    [self.navigationController pushViewController:thirdVc animated:YES];
    
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end

#import "ThirdViewController.h"
#import "ForthViewController.h"
@interface ThirdViewController ()

@end

@implementation ThirdViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    [self.view setBackgroundColor:[UIColor blueColor]];
    
    for (int i = 0 ; i < 3; i ++) {
        
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(100, 100 + i * 60, 100, 50);
        button.tag = i + 10;
        if (i == 0 ) {
           [button setTitle:@"下一级" forState:UIControlStateNormal];
        }else if (i == 1){
            [button setTitle:@"上一级" forState:UIControlStateNormal];
        }else if (i == 2){
            [button setTitle:@"返回root" forState:UIControlStateNormal];
        }
        
        button.backgroundColor = [UIColor lightGrayColor];
        [button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:button];

        
    }
    
//    self.navigationController.viewControllers
    NSLog(@"%@",self.navigationController.viewControllers);
    
    [self toolBarSetting];
}

-(void)toolBarSetting{
    self.navigationController.toolbarHidden = NO;
    
    UIBarButtonItem *item = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:nil action:nil];
    
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];
    
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];
    
    UIBarButtonItem *item3 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    
    
    self.toolbarItems = @[item,item3,item1,item2];
    
}
-(void)onClick:(UIButton*)button{
    if (button.tag == 10) {
        ForthViewController *forthVc = [[ForthViewController alloc]init];
//       把forthVc 入栈
        [self.navigationController pushViewController:forthVc animated:YES];
    }
    if (button.tag == 11) {
//        返回上一级
        [self.navigationController popViewControllerAnimated:YES];
    }
    if (button.tag == 12) {
//        返回root(基栈)
        [self.navigationController popToRootViewControllerAnimated:YES];
    }
}


@end

#import "ForthViewController.h"

@interface ForthViewController ()

@end

@implementation ForthViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
//    设置背景色
    [self.view setBackgroundColor:[UIColor orangeColor]];
//    初始化button
    for (int i = 0 ; i < 3; i ++) {
        
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(100, 100 + i * 60, 100, 50);
        button.tag = i + 10;
        if (i == 0 ) {
            [button setTitle:@"返回第二级" forState:UIControlStateNormal];
        }else if (i == 1){
            [button setTitle:@"上一级" forState:UIControlStateNormal];
        }else if (i == 2){
            [button setTitle:@"返回root" forState:UIControlStateNormal];
        }
        
        button.backgroundColor = [UIColor lightGrayColor];
        [button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:button];
        
        
    }
    
}
-(void)onClick:(UIButton*)button{
    if (button.tag == 10) {
//       根据数组下标 获取要返回到的UIViewController
        UIViewController *VC =   self.navigationController.viewControllers[1];
//        返回到指定的UIViewController
        [self.navigationController popToViewController:VC animated:YES];
    }
    if (button.tag == 11) {
//        返回上一级
        [self.navigationController popViewControllerAnimated:YES];
    }
    if (button.tag == 12) {
//        返回到root(基栈)
        [self.navigationController popToRootViewControllerAnimated:YES];
    }
}
@end

UIProgressView(Objc)

飞羽

Objective-C

发布于：2017年3月6日

UIProgressView


#import "ViewController.h"

@interface ViewController ()
{
    NSTimer *_timer;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
// 初始化UIProgressView并设置frame
//    UIProgressView 高度是固定的
    UIProgressView *progressView = [[UIProgressView alloc]initWithFrame:CGRectMake(100, 100, 200, 100)];
//    设置进度
//    0.0 .. 1.0, default is 0.0.
    progressView.progress = 0.25;
//    已加载进度的颜色
    progressView.progressTintColor = [UIColor redColor];
//    未加载进度的颜色
    progressView.trackTintColor = [UIColor greenColor];
//    设置图片会覆盖上面设置的颜色
//    已加载进度的图片
    progressView.progressImage = [UIImage imageNamed:@"1"];
//    未加载进度的图片
    progressView.trackImage = [UIImage imageNamed:@"2"];
    
//    设置tag值
    progressView.tag = 10;
    
//    添加到视图
    [self.view addSubview:progressView];
    
//    初始化timer
    _timer = [NSTimer     scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(timerRun) userInfo:nil repeats:YES];
    
}
-(void)timerRun{
    UIProgressView *progressView = (UIProgressView *)[self.view viewWithTag:10];
    
    if (progressView.progress < 1.0) {
        progressView.progress += 0.01;
    }else{
        NSLog(@"下载完成");
//        使计时器失效
        [_timer invalidate];
    }
    
}
@end

字符串函数(Objc)

飞羽

Objective-C

发布于：2017年3月5日

字符串函数

//
//  myString.c
//  字符串函数
//
//  Created by 刘晓磊 on 15/12/16.
//  Copyright (c) 2015年 刘晓磊. All rights reserved.
//

#include "myString.h"

size_t myStrlen(const char * s)
{
    size_t count = 0;
    //参数合法性判断
    if (NULL == s) {
        printf("Input Param is invalid!\n");
        return -1;
    }
    
    //因为字符串是以\0结尾的特殊常量，那么\0就可以作为一个结束标记
    //通常对于字符串的操作都是采用while
    while (*s != '\0') {
        count++;
        s++;
    }
    
    return count;
}

char * myStrcpy(char * dst, const char * src)
{
    //需要一个指针变量，来保存dst的首地址
    char * ptemp = NULL;
    //参数合法性判断
    if (NULL == dst || NULL == src) {
        printf("Input Param is invalid!\n");
        return NULL;
    }
    
    //保证传入的首地址变量里面的内容不要更改，始终保佑这个地址
    ptemp = dst;
    while (*src != '\0') {
        *ptemp = *src;
        ptemp++;
        src++;
    }
    *ptemp = '\0';
    
    return dst;
}

char * myStrcat(char * dst, const char * src)
{
    char * ptemp = NULL;
    //参数合法性判断
    if (NULL == dst || NULL == src) {
        printf("Input Param is invalid!\n");
        return NULL;
    }
    ptemp = dst;
    
    //1.找到dst的\0
    while (*ptemp != '\0') {
        ptemp++;
    }
    //找到之后，ptemp刚刚好停在'\0'的位置
    
    while (*src != '\0') {
        *ptemp = *src;
        ptemp++;
        src++;
    }
    *ptemp = '\0';
    
    return dst;
}


int myStrcmp(const char * s1, const char * s2)
{
    //参数合法性判断
    if(NULL == s1 || NULL == s2) {
        printf("Input param is invalid!\n");
        exit(-1);
    }
    //找两个字符串不同的位置，以及'\0'的位置
    //这里有一个条件不符合，我们都要跳出循环
    while (*s1 == *s2 && *s1 != '\0' && *s2 != '\0') {
        s1++;
        s2++;
    }
    
    return *s1 - *s2;
}