ios - 如何添加模糊背景和弹出 View ？

Question

我想在我的应用程序中有一个模糊的背景和 View 弹出窗口。但是当我点击我的按钮时，模糊背景和 View 没有出现......任何人都可以帮助我完成这个任务...... 我的代码是

- (IBAction)ButtonTouched:(id)sender {

if(!UIAccessibilityIsReduceTransparencyEnabled()){
    self.view.backgroundColor = [UIColor clearColor];
    UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    UIVisualEffectView *blureffectview = [[UIVisualEffectView alloc]initWithEffect:blurEffect];
    blureffectview.frame = self.view.bounds;
    blureffectview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    //[self.view addSubview:blureffectview];
    [self.view insertSubview:_AnimatedViewForLoading aboveSubview:blureffectview];


}else{
    //self.view.backgroundColor = [UIColor blackColor];
}



UIView * AnimatedViewForLoading;
 //   [[UIView alloc] initWithFrame:CGRectMake(118, 318, 200, 150)];
self.AnimatedViewForLoading.frame = CGRectMake(118, 318, 200, 150);
[self.AnimatedViewForLoading setBackgroundColor:[UIColor blueColor]];
self.AnimatedViewForLoading.alpha = 0.0f;
//AnimatedViewForLoading.backgroundColor = UIColor.lightGrayColor;

self.AnimatedViewForLoading.transform = CGAffineTransformMakeScale(0.01, 0.01);
 [self.view addSubview:self.AnimatedViewForLoading];
[UIView animateWithDuration:0.2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{

    self.AnimatedViewForLoading.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.1, 1.1);

} completion:^(BOOL finished) {

    NSLog(@"oopssssss..........");
    [UIView animateWithDuration:0.3/2 animations:^{
        self.AnimatedViewForLoading.transform = CGAffineTransformIdentity;
    }];
}];
}

Answer 1

问题

• 为什么不显示模糊背景？ - 因为你没有将它添加到 self.view

  //[self.view addSubview:blureffectview];
  

• 为什么 AnimatedViewForLoading 没有出现？ - 因为你在初始化之前将它添加到 self.view 并且 self.AnimatedViewForLoading.alpha 设置为 0.0f

  // self.AnimatedViewForLoading is hidden at this line
  self.AnimatedViewForLoading.alpha = 0.0f;
  
  // |_AnimatedViewForLoading| is initialized after this line
  [self.view insertSubview:_AnimatedViewForLoading aboveSubview:blureffectview];
  

解决方案

- (IBAction)ButtonTouched:(id)sender {
  //  UIView * AnimatedViewForLoading;
  //   [[UIView alloc] initWithFrame:CGRectMake(118, 318, 200, 150)];
  self.AnimatedViewForLoading = [[UIView alloc] initWithFrame:CGRectMake(118, 318, 200, 150)];
  [self.AnimatedViewForLoading setBackgroundColor:[UIColor blueColor]];
  // self.AnimatedViewForLoading.alpha = 0.0f;
  //AnimatedViewForLoading.backgroundColor = UIColor.lightGrayColor;

  // if(!UIAccessibilityIsReduceTransparencyEnabled()){
  // self.view.backgroundColor = [UIColor clearColor];
    UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    UIVisualEffectView *blureffectview = [[UIVisualEffectView alloc]initWithEffect:blurEffect];
    blureffectview.frame = self.view.bounds;
    blureffectview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self.view addSubview:blureffectview];
    [self.view insertSubview:_AnimatedViewForLoading aboveSubview:blureffectview];
  // }else{
    //self.view.backgroundColor = [UIColor blackColor];
  // }

  self.AnimatedViewForLoading.transform = CGAffineTransformMakeScale(0.01, 0.01);
  [UIView animateWithDuration:0.2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{

    self.AnimatedViewForLoading.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.1, 1.1);

  } completion:^(BOOL finished) {

    NSLog(@"oopssssss..........");
    [UIView animateWithDuration:0.3/2 animations:^{
      self.AnimatedViewForLoading.transform = CGAffineTransformIdentity;
    }];
  }];
}