检查tintColor是否在tintColorDidChange中变暗 [英] Check if tintColor is dimmed in tintColorDidChange

问题描述

在iOS 7中，当颜色变化时（例如，当显示UIAlertView时），会在其 tintColorDidChange 方法中通知视图。

On iOS 7, when the tint color changes (for example, when a UIAlertView is presented), views are notified in their tintColorDidChange method.

我有几个子视图，我想提供一个自定义的禁用状态。 （例如，我想要暂时调暗自定义UIControl的 backgroundColor 。）

I have a few subviews for which I'd like to provide a customized disabled state. (For example, say I'd like to also temporarily dim the backgroundColor of a custom UIControl.)

I已使用此代码：

- (void)tintColorDidChange {
    BOOL isInactive = (CGColorSpaceGetModel(CGColorGetColorSpace([self.tintColor CGColor])) == kCGColorSpaceModelMonochrome);
    if (isInactive) {
        // modify subviews to look disabled
    } else {
        // modify subviews to look enabled
    }
}

但是，在我的某个应用程序的某些视图中，

However, on some views in one of my apps, the active tint color is a very dark gray, and the inactive tint color is a lighter gray.

在这种情况下，两种颜色都报告为非活动，因为两者都是非活动的

In this case, both colors report as "inactive" because both colors are monochrome.

是否有更好的测试来确定当前状态是活动还是变暗？

Is there a better test to determine if the current state is active or dimmed?

推荐答案

看看 UIView tintAdjustmentMode 属性。这样的东西（在你的自定义控件类）：

Have a look at the UIView tintAdjustmentMode property. Something like this (in your custom control class):

- (void)tintColorDidChange {
    BOOL isInactive = self.tintAdjustmentMode == UIViewTintAdjustmentModeDimmed;
    if (isInactive) {
        // modify subviews to look disabled
    } else {
        // modify subviews to look enabled
    }
}

当然，此代码只能在iOS 7.0或更高版本中运行。

Of course this code must only be run under iOS 7.0 or later.

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