如何在 iPhone 中为 UILabel 的背景设置渐变颜色 [英] How to set gradient color to the background of UILabel in iPhone

问题描述

我正在使用以下代码将渐变颜色设置为标签的背景，但没有影响我做错了什么?代码在这里:

I am using the following code to set the gradient color to the background of label but no effect what i am doing wrong? Code is here:

    [self.teamName setTextColor:[UIColor whiteColor]];
    [self.teamName setBackgroundColor:[UIColor clearColor]];
    CAGradientLayer *gradientLayer = [CAGradientLayer layer];
    gradientLayer.frame = self.teamName.bounds;
    gradientLayer.colors = [NSArray arrayWithObjects:(id)[[UIColor whiteColor]CGColor], (id)[[UIColor blackColor]CGColor], nil];
    [self.teamName.layer insertSublayer:gradientLayer atIndex:0];

推荐答案

当我将 CAGradientLayer 插入到主视图时它工作正常.

It working fine when i insert the CAGradientLayer to the main view.

[self.teamName setTextColor:[UIColor whiteColor]];
    [self.teamName setBackgroundColor:[UIColor clearColor]];
    CAGradientLayer *gradientLayer = [CAGradientLayer layer];
    gradientLayer.frame = self.teamName.bounds;
    gradientLayer.colors = [NSArray arrayWithObjects:(id)[[UIColor whiteColor]CGColor], (id)[[UIColor blackColor]CGColor], nil];
    [self.view.layer insertSublayer:gradientLayer atIndex:0];

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