如何使用 Objective-C 更改多个 UIButton 颜色 [英] How to change multiple UIButton colors with Objective-C

问题描述

我使用了许多按钮，我想要一种有效的方式来改变所有的背景颜色，而不是一个一个地改变它或在 AppDelegate 上进行.

I have a number of buttons used and I want an efficient way of changing all it's background color instead of changing it one by one or doing it on the AppDelegate.

我基本上想避免这种情况

I basically want to avoid this

  buttonOne.backgroundColor = [UIColor BlueColor];
  buttonTwo.backgroundColor = [UIColor BlueColor];
  buttonThree.backgroundColor = [UIColor BlueColor];
  buttonFour.backgroundColor = [UIColor BlueColor];

不在 AppDelegate 中执行此操作的有效方法是什么.

What's an efficient way of doing this without doing it in the AppDelegate.

推荐答案

你可以这样做:

UIColor *color = [UIColor blueColor];
NSArray *buttons = @[buttonOne, buttonTwo, buttonThree, buttonFour];
for(UIButton *button in buttons) {
   button. backgroundColor = color;
}

或者，一种更酷的方式，使用 KVC:

Or, a cooler way, using KVC:

NSArray *buttons = @[buttonOne, buttonTwo, buttonThree, buttonFour];
[buttons setValue:[UIColor blueColor] forKey:@"backgroundColor"];

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