flutter 升级到 1.12.x android 启动时会黑屏解决办法

飞羽

Flutter

发布于：2020年4月23日

flutter 升级到 1.12.x android 启动时会黑屏解决办法

直接用flutter 1.12.x SDK创建的项目

需要修改AndroidManifest.xml文件，修改如下：

<application
        android:name="io.flutter.app.FlutterApplication"
        android:label="ifeiyv"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
              //
            <meta-data
                android:name="io.flutter.embedding.android.SplashScreenDrawable"
                android:resource="@drawable/launch_background"
                />
            <meta-data
                android:name="io.flutter.embedding.android.NormalTheme"
                android:resource="@drawable/launch_background"
                />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>

如果存在meta-data 的 android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"，删除此meta-data，添加如下代码：

<meta-data
     android:name="io.flutter.embedding.android.SplashScreenDrawable"
     android:resource="@drawable/launch_background"
 />
 <meta-data
     android:name="io.flutter.embedding.android.NormalTheme"
     android:resource="@drawable/launch_background"
  />

修改launch_background.xml，这个要根据需求添加开屏视图

<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
         android:left="0dp"
         android:top="0dp"
         android:bottom="0dp"
         android:right="0dp"
        android:drawable="@drawable/pic_bg" />
    <!-- You can insert your own image assets here -->  
</layer-list>

在<application>标签下添加新的 <meta-data> ,一旦您在AndroidManifest中进行了声明并使用了插件，能够使用使用了新的Android的插件（将插件注册为，FlutterEngine而不是PluginRegistry.Registrar

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3

< meta-data 
    android ：name = “flutterEmbedding”
    android ：value = “2” />

如果是低版本创建的项目升级,除了以上修改外还需要修改以下内容：

//FlutterActivity包路径修改
//把
import io.flutter.app.FlutterActivity;
//修改为
import io.flutter.embedding.android.FlutterActivity;

以前

import io.flutter.app.FlutterActivity;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GeneratedPluginRegistrant.registerWith(this);
  }

  // ...some amount of custom code for your app is here.
}

现在

import androidx.annotation.NonNull;
import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {
  @Override
  public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine);
  }
}

这里仅有修复黑屏的问题，更多升级详细信息请前往 官方升级指南 -》 前往

flutter报错

飞羽

Flutter

发布于：2020年4月23日

1.引入webview_flutter 报错 `Trying to embed a platform view but the PrerollContext does not support embedding`

在iOS工程的info.plist文件中添加键值对key=io.flutter.embedded_views_preview value=YES

This method overrides a method annotated as @mustCallSuper in 'AutomaticKeepAliveClientMixin', but doesn't invoke the overridden method.

飞羽

Flutter

发布于：2020年4月14日

使用`AutomaticKeepAliveClientMixin` 警告⚠️ `This method overrides a method annotated as @mustCallSuper in 'AutomaticKeepAliveClientMixin', but doesn't invoke the overridden method.`

该方法将覆盖在’AutomaticKeepAliveClientMixin’中标注为@mustCallSuper的方法，但不会调用覆盖的方法。

解决方案：

检查添加AutomaticKeepAliveClientMixin

添加

1 2	@override <br> bool get wantKeepAlive => true;

build方法中记得调用父类方法super.build(context);

Widget build(BuildContext context) {
    super.build(context);
    return Container();
}

flutter输入框键盘弹起被遮挡问题

飞羽

Flutter

发布于：2020年4月3日

解决键盘弹起遮挡问题

Scaffold的resizeToAvoidBottomPadding属性（v1.1.9之后已废弃）
resizeToAvoidBottomInset：为true键盘弹起输入框会自动上移，为false不移动，如果输入框靠下，有可能被遮挡住。默认为true

/// This flag is deprecated, please use [resizeToAvoidBottomInset]
/// instead.
///
/// Originally the name referred [MediaQueryData.padding]. Now it refers
/// [MediaQueryData.viewInsets], so using [resizeToAvoidBottomInset]
/// should be clearer to readers.
@Deprecated(
  'Use resizeToAvoidBottomInset to specify if the body should resize when the keyboard appears. '
  'This feature was deprecated after v1.1.9.'
)
final bool resizeToAvoidBottomPadding;

/// If true the [body] and the scaffold's floating widgets should size
/// themselves to avoid the onscreen keyboard whose height is defined by the
/// ambient [MediaQuery]'s [MediaQueryData.viewInsets] `bottom` property.
///
/// For example, if there is an onscreen keyboard displayed above the
/// scaffold, the body can be resized to avoid overlapping the keyboard, which
/// prevents widgets inside the body from being obscured by the keyboard.
///
/// Defaults to true.
final bool resizeToAvoidBottomInset;

如果以上配置报错（键盘弹起，布局溢出）界面布局可以用滚动容器承载。eg:把当前界面放到SingleChildScrollView上

Flutter创建项目命令

飞羽

Flutter

发布于：2020年4月2日

创建flutter项目命令

进入到要创建项目的位置，在当前目录下创建项目名称为mydemo的项目

基本默认创建 flutter create mydemo

创建一个 iOS 基于 Swift ，Android基于Java的flutter项目

1	flutter create --ios-language swift --android-language kotlin mydemo

创建一个 iOS 基于 Swift ，Android基于kotlin的flutter项目

1	flutter create --ios-language swift --android-language kotlin mydemo

创建一个 iOS 基于 OC ，Android基于kotlin的flutter项目

1	flutter create --ios-language objc --android-language kotlin mydemo

创建一个 iOS 基于 OC ，Android基于java的flutter项目
1
flutter create --ios-language objc --android-language java mydemo
- VSCode 配置创建
  
  配置路径 code>preferences>Settings — User > Extensions > Dart & Flutter

flutter

MAC 模拟鼠标和键盘事件

飞羽

Mac

发布于：2020年3月30日

代码模拟鼠标和键盘事件

网上搜索了一下，基本上都是很早的代码。原理虽然一样，但是代码已经进行多次改版了，特别是现在的Swift

//
//  FyMKUtils.swift
//  SimulationMouseKeyboard
//
//  Created by l on 2020/3/30.
//  Copyright © 2020 ifeiyv. All rights reserved.
//

import Cocoa

class FyMKUtils: NSObject {
    
    //MARK:移动鼠标到坐标位置
    open class func mouseMove(point:CGPoint,button:CGMouseButton = .left){
        postMouseEvent(button: button, type: .mouseMoved, point: point);
    }
    
    //MARK:左键单击
    open class func leftClick(point: CGPoint)
    {
        click(point: point, button: .left)
    }
    //MARK:左键双击
    open class func leftDoubleClick(point: CGPoint)
    {
        doubleClick(point: point, button: .left)
    }
    
    //MARK:左键拖拽
    ///point : 初始位置坐标
    ///toPoint : 拖拽到的目的位置坐标
    open class func leftMouseDragged(point:CGPoint,toPoint:CGPoint){
        mouseDragged(point:point,toPoint:toPoint,button:.left)
    }
    
    //MARK:右键单击
    open class func rightClick(point: CGPoint)
    {
        click(point: point, button: .right)
    }
    
    //MARK:右键双击
    open class func rightDoubleClick(point: CGPoint)
    {
        doubleClick(point: point, button: .right)
    }
    
    //MARK:右键拖拽
    ///point : 初始位置坐标
    ///toPoint : 拖拽到的目的位置坐标
    open class func rightMouseDragged(point:CGPoint,toPoint:CGPoint){
        mouseDragged(point:point,toPoint:toPoint,button:.right)
    }
    
    //MARK:鼠标从一个坐标移动到另一个坐标
    open class func mouseMove(point:CGPoint, toPoint:CGPoint){
        
        //拖到的目的位置x大于原始位置的X坐标
        let toMaxX:Bool = toPoint.x - point.x > 0
        //拖到的目的位置y大于原始位置的Y坐标
        let toMaxY:Bool = toPoint.y - point.y > 0
        
        var tempPointY = point.y
        var tempPointX = point.x
        
        
        let blockOperation = BlockOperation()
        
        //1.拖拽目的坐标的Y坐标
        blockOperation.addExecutionBlock {
            while  toMaxY ? (toPoint.y > tempPointY) : (toPoint.y < tempPointY){
                toMaxY ?  (tempPointY += 1) : (tempPointY -= 1)
                postMouseEvent(button: .left, type: .mouseMoved, point: CGPoint(x: tempPointX, y: tempPointY),clickCount: 1);
                Thread.sleep(forTimeInterval: 0.001)
            }
        }
        //2.拖拽目的坐标的X坐标
        blockOperation.addExecutionBlock {
            while toMaxX ? (toPoint.x > tempPointX) : (toPoint.x < tempPointX) {
                toMaxX ? (tempPointX += 1) : (tempPointX -= 1)
                postMouseEvent(button: .left, type: .mouseMoved, point: CGPoint(x: tempPointX, y: tempPointY),clickCount: 1);
                Thread.sleep(forTimeInterval: 0.001)
            }
            
        }
        //开始执行Operation
        blockOperation.start()
        
    }

    
    //MARK:拖拽鼠标事件
    open class func mouseDragged(point:CGPoint,toPoint:CGPoint,button:CGMouseButton){
        //拖到的目的位置x大于原始位置的X坐标
        let toMaxX:Bool = toPoint.x - point.x > 0
        //拖到的目的位置y大于原始位置的Y坐标
        let toMaxY:Bool = toPoint.y - point.y > 0
        
        var tempPointY = point.y
        var tempPointX = point.x
        
        //1.按下鼠标
        postMouseEvent(button: button, type: button == .left  ? .leftMouseDown : .rightMouseDown, point: point,clickCount: 1);
        
        let blockOperation = BlockOperation()
        
        //2.拖拽目的坐标的Y坐标
        blockOperation.addExecutionBlock {
            while  toMaxY ? (toPoint.y > tempPointY) : (toPoint.y < tempPointY){
                toMaxY ?  (tempPointY += 1) : (tempPointY -= 1)
                postMouseEvent(button: button, type: button == .left  ? .leftMouseDragged : .rightMouseDragged, point: CGPoint(x: tempPointX, y: tempPointY),clickCount: 1);
            }
        }
        //3.拖拽目的坐标的X坐标
        blockOperation.addExecutionBlock {
            while toMaxX ? (toPoint.x > tempPointX) : (toPoint.x < tempPointX) {
                toMaxX ? (tempPointX += 1) : (tempPointX -= 1)
                postMouseEvent(button: button, type: button == .left  ? .leftMouseDragged : .rightMouseDragged, point: CGPoint(x: tempPointX, y: tempPointY),clickCount: 1);
            }
            
        }
        //4.松开鼠标
        blockOperation.completionBlock = {
            print("hhhhh")
            postMouseEvent(button: button, type: button == .left  ? .leftMouseUp : .rightMouseUp, point: toPoint,clickCount: 1);
        }
        //开始执行Operation
        blockOperation.start()
    }

    
    //MARK:鼠标单击
    open class func click(point: CGPoint,button:CGMouseButton,clickCount:Int64 = 1){
        //1.按下鼠标左键（移动到坐标位置后，可以加适当延时再按鼠标左键）
        postMouseEvent(button: button, type: button == .left  ? .leftMouseDown : .rightMouseDown, point: point,clickCount: clickCount);
        //2.松开鼠标左键
        postMouseEvent(button: button, type: button == .left  ? .leftMouseUp : .rightMouseUp, point: point,clickCount: clickCount);
    }
    //MARK:鼠标双击
    open class func doubleClick(point: CGPoint,button:CGMouseButton){
        click(point: point, button: button,clickCount:1)
        click(point: point, button: button,clickCount:2)
    }
    
    
    //鼠标事件
    private class func postMouseEvent(button:CGMouseButton, type:CGEventType, point: CGPoint,clickCount:Int64 = 1)
    {
        let event = createMouseEvent(button: button, type: type, point: point,clickCount:clickCount)
        event.post(tap: CGEventTapLocation.cghidEventTap)
    }
    //创建鼠标事件
    open class func createMouseEvent(button:CGMouseButton, type:CGEventType, point: CGPoint,clickCount:Int64 = 1) ->  CGEvent
    {
        let event : CGEvent  = CGEvent(mouseEventSource: CGEventSource.init(stateID: CGEventSourceStateID.privateState), mouseType: type, mouseCursorPosition: point, mouseButton: button)!
        event.setIntegerValueField(CGEventField.mouseEventClickState, value: clickCount)
        return event
    }
    
    ///鼠标滚轮事件目前仅支持OSX 10.13版本以上使用
    ///postion 横向或者纵向滚动的距离，
    ///纵向   postion为正数 向下滚动，为负数 向上滚动，横向   postion为正数 向右滚动，为负数 向左滚动
    ///FyMKUtils.postScrollWheelEvent(position: -10000,scrollOrientation: .horizontal)//向左滚动10000 个像素点
    ///FyMKUtils.postScrollWheelEvent(position: 10000,scrollOrientation: .horizontal)//向右滚动10000 个像素点
    ///FyMKUtils.postScrollWheelEvent(position: -10000,scrollOrientation: .vertical)//向上滚动10000 个像素点
    ///FyMKUtils.postScrollWheelEvent(position: 10000,scrollOrientation: .vertical)//向下滚动10000 个像素点
    ///scrollOrientation  横向或者纵向
    ///units: 滚动距离单位   .pixel 像素 .line行。默认像素
    @available(OSX 10.13, *)
    open class func postScrollWheelEvent(position:Int32 ,scrollOrientation:ScrollOrientation = .vertical,units:CGScrollEventUnit = .pixel){
        //翻转偏移值
        let tempPosition = -position
        let event  = CGEvent(scrollWheelEvent2Source:nil, units: units, wheelCount: 2, wheel1: scrollOrientation == .vertical ? tempPosition : 0, wheel2: scrollOrientation == .horizontal ? tempPosition : 0,wheel3: 0)
        event?.post(tap: .cghidEventTap)
        
    }
    
    //
    
    
    //MARK:-------------------------------
    //MARK:键盘类操作
    
    /*
    public struct CGEventFlags : OptionSet {

        public init(rawValue: UInt64) /* Flags for events */

        
        /* Device-independent modifier key bits. */
     
        //大小写锁定键处于开启状态(亮灯状态)
        public static var maskAlphaShift: CGEventFlags { get }
        
        //Shift 键按下
        public static var maskShift: CGEventFlags { get }
        
        //Control 键按下
        public static var maskControl: CGEventFlags { get }

        //Alt(Option) 键按下
        public static var maskAlternate: CGEventFlags { get }

        //Command 键按下
        public static var maskCommand: CGEventFlags { get }

        
        /* Special key identifiers. */
        //Help 键按下
        public static var maskHelp: CGEventFlags { get }

        //Fn 键按下
        public static var maskSecondaryFn: CGEventFlags { get }

        
        /* Identifies key events from numeric keypad area on extended keyboards. */
        //数字键 按下
        public static var maskNumericPad: CGEventFlags { get }

        
        /* Indicates if mouse/pen movement events are not being coalesced */
        //没有鼠标和苹果笔 按下
        public static var maskNonCoalesced: CGEventFlags { get }
    }
    */
    
    /// 键盘类操作
    /// - Parameters:
    ///   - keyCode: 键盘事件中使用的虚拟键码,CGKeyCode 要使用系统定义好的，需要导入  import Carbon     eg  A:  kVK_ANSI_A
    ///   - keyDown: keyDown true按下 false 抬起  成对存在
    ///   - flags: CGEventFlags  ---- 用作组合键
    /// - ForExample:
    ///   - K: FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: true, flags: .maskNonCoalesced) <br>
    ///     FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: false, flags: .maskNonCoalesced) <br>
    ///   - Command + KC: FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: true, flags: .maskCommand) <br>FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: false, flags: .maskCommand)
    ///   - Command + Shift + K: <br> FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: true, flags: [.maskCommand,.maskShift]) <br> FyMKUtils.postKeyboardEvent(keyCode: CGKeyCode(kVK_ANSI_K), keyDown: false, flags: [.maskCommand,.maskShift])
    open class func postKeyboardEvent(keyCode:CGKeyCode,keyDown:Bool,flags:CGEventFlags){
        let event = CGEvent.init(keyboardEventSource: CGEventSource.init(stateID: CGEventSourceStateID.privateState), virtualKey: keyCode, keyDown: keyDown)
        event?.flags = flags
        event?.post(tap: .cghidEventTap)
    }
    
}

//MARK:鼠标滚动方向
enum ScrollOrientation {
    case horizontal
    case vertical
}

Mac 文件已损坏或者未知开发者解决办法

飞羽

Mac

发布于：2020年3月17日

sudo spctl –master-disable (所有来源权限)

各位注意，这是10.15以上系统的完美解决方法

打开终端（Terminal），输入以下命令后回车，如需要，请输入密码

sudo xattr -r -d com.apple.quarantine

注：为应用程序路径，直接从文件夹目录拖拽即可自动填写

结合RxSwift、Moya、和HandyJSON封装网络请求模板

飞羽

Swift

发布于：2020年3月16日

FyNetWork

结合RxSwift、Moya、和HandyJSON封装网络请求模板

【该模板已经上传Github】-> 前往Github 获取代码

文件功能

Podfile

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2
3

//可以根据不同版本，调整库的版本（不同版本可能需要库的版本不同）
pod 'Moya/RxSwift', '~> 12.0.1'
pod 'HandyJSON', '~> 5.0.1'

FyUrls.swift

主要放一些请求Url


struct FyUrls {
    /// 服务器环境 true: 正服 false: 测服
    
    #if DEBUG
    //测试环境
    static let service: Bool = false
    #else
    //正式环境
    static let service: Bool = true
    #endif

    static var domain: String {
        // "正服地址" : "测服地址" (这里是网上搜到的开放接口，没有测试地址，两个都写正式地址)
        return FyUrls.service ? "https://v1.alapi.cn/" : "https://v1.alapi.cn/"
    }
    
    
    //这里写拼接到域名上的Url
    static var searchMusic: String {
        return "api/music/search"
    } 
    
    //.......
     
}

阅读全部

iOS 13 DarkMode适配

飞羽

iOS

发布于：2020年3月13日

封装颜色管理类


//
//  FyColor.swift
//  FyColor
//
//  Created by l on 2020/3/13.
//  Copyright © 2020 ifeiyv. All rights reserved.
//
import UIKit

class FyColors{
    
    ///深色模式适配  手动控制适配模式 启用 关闭(如非必要，可移除相关代码)
    static let isOpenDarkModel:Bool  = true
    
    
    //MARK: eg文字颜色
    //文字颜色  如果有多种文字颜色可以设置多个 eg: labelTextColor
    public class var labelTextColor: UIColor {
        return darkModeColor(dark:UIColor.white,light:UIColor.black)
    }
    //文字颜色  如果有多种文字颜色可以设置多个 eg:  buttonTextColor
    public class var buttonTextColor: UIColor {
        return darkModeColor(dark:UIColor.white,light:UIColor.black)
    }
    
    //文字颜色  如果有多种文字颜色可以设置多个 eg:  fieldTextColor
    public class var fieldTextColor: UIColor {
        return darkModeColor(dark:UIColor.white,light:UIColor.black)
    }
    
    //MARK: eg背景颜色
    //背景颜色  如果有多种文字颜色可以设置多个 eg: labelBgColor
    public class var labelBgColor: UIColor {
        return darkModeColor(dark:UIColor.black,light:UIColor.white)
    }
    //背景颜色  如果有多种文字颜色可以设置多个 eg:  buttonBgColor
    public class var buttonBgColor: UIColor {
        return darkModeColor(dark:UIColor.black,light:UIColor.white)
    }
    
    //背景颜色  如果有多种背景颜色可以设置多个 eg:  viewBgColor
    public class var viewBgColor: UIColor {
        return darkModeColor(dark:UIColor.black,light:UIColor.white)
    }
    
    //.........................................
    //根据需求增加相对应的颜色即可
    //darkModeColor(dark:UIColor.white,light:UIColor.black)
    //实际开发中不可能只有 UIColor.white，UIColor.black 两种颜色。
    //根据产品需求增加和修改对应的颜色
    
    
    //检测当前是否是深色模式
    class func isDarkStyle() -> Bool{
        if(!isOpenDarkModel){
            return false
        }
        if #available(iOS 13.0, *){
            let currentMode = UITraitCollection.current.userInterfaceStyle
            if(currentMode == .dark){
                return  true
            }
        }
        return false
    }
    // 适配 动态颜色
    class func darkModeColor(dark:UIColor,light:UIColor) ->UIColor{
        if(!isOpenDarkModel){
            return light
        }
        if #available(iOS 13.0, *){
            return UIColor{(trainCollection) -> UIColor in
                if trainCollection.userInterfaceStyle == .dark{
                    return dark
                }else{
                    return light
                }
            }
        }
        return light
    }
}

使用方式：(深色模式切换时，系统会重新渲染颜色，自动在设置好的两种颜色中进行切换)

label.textColor = FyColors.labelTextColor
   
label.backgroundColor = FyColors.labelBgColor

 //或者在此方法监听深色模式进行手动切换
override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
    super.traitCollectionDidChange(previousTraitCollection)
}

1.引入webview_flutter 报错 Trying to embed a platform view but the PrerollContext does not support embedding

使用AutomaticKeepAliveClientMixin 警告⚠️ This method overrides a method annotated as @mustCallSuper in 'AutomaticKeepAliveClientMixin', but doesn't invoke the overridden method.

解决键盘弹起遮挡问题

创建flutter项目命令

代码模拟鼠标和键盘事件

sudo spctl –master-disable (所有来源权限)

各位注意，这是10.15以上系统的完美解决方法

打开终端（Terminal），输入以下命令后回车，如需要，请输入密码

sudo xattr -r -d com.apple.quarantine

FyNetWork

文件功能

Podfile

FyUrls.swift

封装颜色管理类

使用方式：(深色模式切换时，系统会重新渲染颜色，自动在设置好的两种颜色中进行切换)

1.引入webview_flutter 报错 `Trying to embed a platform view but the PrerollContext does not support embedding`

使用`AutomaticKeepAliveClientMixin` 警告⚠️ `This method overrides a method annotated as @mustCallSuper in 'AutomaticKeepAliveClientMixin', but doesn't invoke the overridden method.`