iPhone: UIImageView Fades in - Howto?(iPhone:UIImageView 淡入 - Howto?)

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问题描述

我有一个想要淡入的 UIImageView.

I have an UIImageView that I want to fade in.

有没有办法在底层 UIViewController 上启用它?

Is there a way to enable that on an underlying UIViewController?

我已经翻译了最简单的答案，虽然它们都可以工作，C# .NET MonoTouch 用户:

I have translated the simplest answer, though they all work, C# .NET for the MonoTouch users:

public override void ViewDidAppear (bool animated)
{
    base.ViewDidAppear (animated);
    UIView.BeginAnimations ("fade in");
    UIView.SetAnimationDuration (1);
    imageView.Alpha = 1;
    UIView.CommitAnimations ();
}

推荐答案

初始设置你的imageview的alpha为0为imageView.alpha = 0;

Initially set the alpha of your imageview as 0 as imageView.alpha = 0;

- (void)fadeInImage 
{
[UIView beginAnimations:@"fade in" context:nil];
    [UIView setAnimationDuration:1.0];
    imageView.alpha = 1.0;
    [UIView commitAnimations];

}

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