在Disabale UIButton上 [英] on Disabale UIButton

问题描述

当禁用按钮时.不透明度降低到50％.是否有任何方法可以将不透明度降低到25％

when disable button. opacity reduced to 50% .is there any way to reduce opacity to 25%

推荐答案

我将UIButton子类化，并将setEnabled:方法重写为类似这样的内容:

I would subclass UIButton and override the setEnabled: method to something like this:

- (void) setEnabled:(BOOL)enabled {
    NSLog(@"Button enabled = %d", enabled);
    [super setEnabled:enabled];


    UIColor *color = self.backgroundColor;
    if (!self.isEnabled) {
        self.backgroundColor = [color colorWithAlphaComponent:0.75];
    } else {
        self.backgroundColor = [color colorWithAlphaComponent:1.0];
    }
}

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