显示隐藏的视图，然后隐藏它与Objective-C中的相同的动画

我有一个UITextField搜索框，首先它是隐藏的，我想用动画显示它，它的工作原理。但是当我再次隐藏它时，动画会突然发生，而不是动画中定义的时间。显示隐藏的视图，然后隐藏它与Objective-C中的相同的动画

这里是我的代码：

[UIView transitionWithView:searchbox duration:0.3 
    options:UIViewAnimationOptionTransitionCrossDissolve 
    animations:^{searchbox.hidden = NO;}completion:NULL]; 

    [UIView transitionWithView:searchbox duration:0.3 
    options:UIViewAnimationOptionTransitionCrossDissolve 
    animations:^{searchbox.hidden = YES;}completion:NULL];

来源

2017-08-02 SaMi GiMiX

只是增加其在时间隐藏以查看效果。即使在特定的时间，我的身边也能很好地工作，但速度更快。 –

大多数使用.alpha隐藏或显示UIView。

正确的代码是：

[UIView transitionWithView:searchbox duration:0.3 
options:UIViewAnimationOptionTransitionCrossDissolve 
animations:^{searchbox.alpha=1;}completion:NULL]; 

[UIView transitionWithView:searchbox duration:0.3 
options:UIViewAnimationOptionTransitionCrossDissolve 
animations:^{searchbox.alpha=0;}completion:NULL];

来源

2017-08-02 09:00:19

应该有你的动画调用之间的延迟。下面是一个例子：

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(show) userInfo:nil repeats:NO]; 
} 

- (void) show { 
    [UIView transitionWithView:searchbox duration:0.3 
         options:UIViewAnimationOptionTransitionCrossDissolve 
        animations:^{searchbox.hidden = NO;}completion:NULL]; 

    [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(hide) userInfo:nil repeats:NO]; 
} 

- (void) hide { 
    [UIView transitionWithView:searchbox duration:0.3 
         options:UIViewAnimationOptionTransitionCrossDissolve 
        animations:^{searchbox.hidden = YES;}completion:NULL]; 
}

来源

2017-08-02 09:01:14

要显示

searchbox.alpha = 0; 
searchbox.isHidden = NO; 
[UIView transitionWithView:searchbox 
      duration:0.3 
      options:UIViewAnimationOptionTransitionCrossDissolve 
     animations:^{ 
      searchbox.alpha = 1.0 
    }completion:NULL];

要隐藏的观点

searchbox.alpha = 1.0; 
searchbox.isHidden = NO; 
[UIView transitionWithView:searchbox 
      duration:0.3 
      options:UIViewAnimationOptionTransitionCrossDissolve 
     animations:^{ 
      searchbox.alpha = 0 
    }completion:^(isComplete){ 
     if (isComplete) { 
     searchbox.isHidden = YES 
     }}];

来源

2017-08-02 10:08:44

使用alpha属性，而不是隐藏

[UIView transitionWithView:searchbox duration:0.3 
options:UIViewAnimationOptionTransitionCrossDissolve 
animations:^{searchbox.alpha = 1.0;}completion:NULL]; 

[UIView transitionWithView:searchbox duration:0.3 
options:UIViewAnimationOptionTransitionCrossDissolve 
animations:^{searchbox.alpha = 0;}completion:NULL];

来源

2017-08-02 14:03:03

显示隐藏的视图，然后隐藏它与Objective-C中的相同的动画

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