【问题标题】:IOS - buttons slide in from right side animationIOS - 按钮从右侧动画滑入
【发布时间】:2014-04-03 09:22:49
【问题描述】:

我是 IOS 编程新手。我的屏幕上有一张背景图片。我想要的是当应用程序启动屏幕时显示背景图像,然后在 1 秒后 2 个按钮从屏幕右侧出现。我怎样才能做到这一点。这是我想要做的图像

按钮 1 和按钮 2 必须首先不可见。 1 秒后,它们从右侧升起。 如果有这种动画相关的教程,请分享

【问题讨论】:

标签: ios animation


【解决方案1】:

您可以使用简单的 UIView 动画来实现这一点。

将您的按钮 x 原点设置为大于屏幕大小的任何值,以便它首先不可见。然后使用视图动画将按钮框架重置为可见值。例如,在您的 viewWillAppear: 方法中调用以下函数。

- (void) animateButton {

  // Setting button origin to value greater than the view width.
  CGRect frame = button.frame;
  frame.origin.x = self.view.frame.size.width+10;// or set any value > 320
  button.frame = frame;

    [UIView animateWithDuration:0.5
                          delay:2.0
                        options: UIViewAnimationCurveEaseOut
                     animations:^{
                         button.frame = CGRectMake(20, 100, 60, 25) ;// Any value according to your requirement
                     } 
                     completion:^(BOOL finished){
                         NSLog(@"Done!");
                     }];
}

参考Tutorial

【讨论】:

    【解决方案2】:

    您可以这样做,请注意,如果您想以动画方式显示按钮,您必须使用alpha = 0.0f(而不是hidden = true)隐藏它们。这样,您将获得流畅的显示动画!

    这里是:

    首先,在您的UIViewControllerviewDidLoad 上,您必须设置一个1 秒的NSTimer,然后让它调用让您的按钮出现的方法:

    - (void) viewDidLoad {
        [super viewDidLoad];
        // Do your init stuff here
    
        // We will call your buttons as if they are declared as properties of your class, ask if you don't know how to set them
        self.button1.alpha = 0.0f;
        self.button2.alpha = 0.0f;
    
        // This will wait 1 sec until calling showButtons, where we will do the trick
         NSTimeInterval timeInterval = 1.0;
        [NSTimer scheduledTimerWithTimeInterval:timeInterval target:self selector:@selector(showButtons) userInfo:nil repeats:NO];
     }
    
    - (void) showButtons {
        [UIView beginAnimations:@"buttonShowUp" context:nil];
        [UIView setAnimationDuration:0.5]; // Set it as you want, it's the length of your animation
    
        self.button1.alpha = 1.0f;
        self.button2.alpha = 1.0f;
    
        // If you want to move them from right to left, here is how we gonna do it :
        float move = 100.0f; // Set it the way you want it
        self.button1.frame = CGRectMake(self.button1.frame.origin.x - move,
                                        self.button1.frame.origin.y,
                                        self.button1.frame.size.width,
                                        self.button1.frame.size.height);
    
        self.button2.frame = CGRectMake(self.button2.frame.origin.x - move,
                                        self.button2.frame.origin.y,
                                        self.button2.frame.size.width,
                                        self.button2.frame.size.height);
    
         // If you want to set them in the exact center of your view, you can replace 
         // self.button1.frame.origin.x - move
         // by the following
         // (self.view.center - self.button1.frame.size.width/2)
         // This way, your button will be centered horizontally
    
        [UIView commitAnimations];
    }
    

    有什么问题可以问!

    【讨论】:

      【解决方案3】:

      设置按钮的 x 坐标,使按钮刚好位于屏幕右侧。

      然后在您的 viewDidLoad() 中尝试以下操作

      [UIView animateWithDuration:0.5
                                    delay:1.0
                                  options:NO
                               animations:^{ change your button x co- ordinate here to the co-ordinate you need it on finally}
                               completion:NULL];
      

      【讨论】:

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