我可以淡入淡出/为UIToolbar的tintColor设置动画吗?

问题描述

我正在尝试为UIToolbar的tintColor属性设置动画，以将其从一个tintColor更改为另一个.

I am trying to animate a UIToolbar's tintColor property, to change it from one tintColor to another.

这是我正在尝试的代码.不幸的是，更改会立即发生，并且不会从绿色变为蓝色.这很奇怪，因为我知道在网络共享或打来电话时，苹果会褪色并且脉冲"工具栏的颜色会变淡.那为什么不起作用呢?

Here is the code I am trying. Unfortunately, the change occurs immediately and does not fade from green to blue. This is strange because I know Apple fades and "pulses" toolbar tint colors when tethering or on a phone call. So why doesn't this work?

// set initial tint color
myBottomToolBar.tintColor = [UIColor colorWithRed:0.15 green:0.95 blue:0.15 alpha:0.6];

//animation stuff
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.95];
[UIView setAnimationDelegate:self];

//thing to animate
myBottomToolBar.tintColor = [UIColor colorWithRed:0.15 green:0.35 blue:0.45 alpha:0.6];

//animation stuff
[UIView commitAnimations];

推荐答案

无法通过公共API设置动画的颜色.您可以通过手动更改计时器的颜色来解决此问题.您将必须插入中间颜色级别.

The tint color in not animatable through public APIs. You can work around this by manually changing the tint color on a timer. You would have to interpolate the intermediate color levels.

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