[iOS开发] iOS实现组件录屏视频不可见，用户肉眼可见（类似系统键盘效果）

-(UIView *)initWithFrame:(CGRect)frame{
  
  UITextField * root=[[UITextField alloc] initWithFrame:frame];
  if(root){
    root.secureTextEntry=YES;//利用密码框录屏不可见的特性
  UIView *textLayoutCanvasView=root.subviews.firstObject;//获取_UITextLayoutCanvasView
  if (textLayoutCanvasView.subviews.count) {
    [textLayoutCanvasView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
  }
  textLayoutCanvasView.frame=frame;
  textLayoutCanvasView.userInteractionEnabled=YES;
    textLayoutCanvasView.backgroundColor=[UIColor clearColor];
  return textLayoutCanvasView;
  }
  
  return root.subviews.firstObject;
}

CustomKeyboard *keyboard=[[CustomKeyboard alloc]init];//你的自定义键盘类
UIView *shield=[self initWithFrame:keyboard.frame];//实现录屏不可见的_UITextLayoutCanvasView
[shield addSubview:keyboard];//让键盘基于_UITextLayoutCanvasView
shield.userInteractionEnabled=YES;//允许交互，不然无法点击
UITexrField.inputView=shield;//设置UITextField的inputView