我该怎么办的UIView animateWithDuration在viewDidLoad中？ IOS 7 [英] how can i do UIView animateWithDuration in viewDidLoad? ios7

问题描述

我尝试这viewDidAppear，但我有延迟一秒钟=（我能做些什么？在viewDidLoad中工作？

   - （无效）viewDidAppear：动画（BOOL）{
            fullRotation = [CABasicAnimation animationWithKeyPath：@transform.rotation];
            fullRotation.fromValue = [NSNumber的numberWithFloat：0];
            fullRotation.toValue = [NSNumber的numberWithFloat：（（720 * M_PI）/ 360）];
            fullRotation.duration = 5;
            // fullRotation.repeatCount = 1e10f;
            [_propImaCirculoCompleto.layer addAnimation：fullRotation forKey：@360];
}
 

解决方案

您不应该做的 viewDidLoad中任何动画作为视图不会有上海华却又如此动画是无关紧要的。

在你的code样品的一点想法：

• 您可以使用 viewDidAppear 只要你想要的每一个动画
  出现时间来看，不只是第一次是presented。




• 动画块中使用的Core Animation是没有必要的。做一个或另一个。

建议

如果你想通过动画不同的视图控制器管理的视图的外观上，presenting控制器负责动画。有实现的iOS这取决于你的最低支持版本的一些方法。

• 在iOS 5以上，你可以使用自定义容器控制器present子视图控制器定义动画。




• 在搭载iOS 7，您可以使用'presentViewController：动画：完成，并指定一个自定义动画。然后，您可以设置 transitioningDelegate 属性，并有代表提供的过渡动画。

我没有准备好样品code为上述但是这会是什么样我在

I try this in viewDidAppear but i have a one second of delay =( what can i do? for work in viewDidLoad?

-(void)viewDidAppear:(BOOL)animated{


            fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
            fullRotation.fromValue = [NSNumber numberWithFloat:0];
            fullRotation.toValue = [NSNumber numberWithFloat:((720*M_PI)/360)];
            fullRotation.duration = 5;
            //  fullRotation.repeatCount = 1e10f;
            [_propImaCirculoCompleto.layer addAnimation:fullRotation forKey:@"360"];


}

解决方案

You shouldn't do any animation in viewDidLoad as the view won't have a superview yet so the animation is irrelevant.

A few thoughts on your code sample:

• You can use viewDidAppear as long as you want the animation every time the view appears, not just the first time it is presented.

• Using Core Animation within an animation block isn't necessary. Do one or the other.

Suggestions

If you are trying to animate the appearance of a view managed by a different view controller, the presenting controller is responsible for the animation. There are a few ways to implement this depending on your minimum supported version of iOS.

• In iOS 5+ you can use a custom container controller to present a child view controller with a defined animation.

• In iOS 7 you can use 'presentViewController:animated:completion' and specify a custom animation. You would then set the transitioningDelegate property and have the delegate provide the animator for the transition.

I don't have ready sample code for the above but that's what I would look at.

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