IOS 7按钮图像颜色

Posted 2023-02-23

【中文标题】IOS 7按钮图像颜色

【英文标题】：IOS 7 button image color

【发布时间】：2014-03-27 10:30:42

【问题描述】：

我的UIButton 的一部分是UIImage，ios 7 将其颜色从黑色变为蓝色。我尝试了这里提供的解决方案：将按钮类型更改为UIButtonTypeSystem，但这无济于事，图像仍然是蓝色的。这是我正在使用的通用代码：

UIButton *iWantPlan = [UIButton buttonWithType:UIButtonTypeSystem];
iWantPlan.frame = CGRectMake(self.view.bounds.size.width/2-bgImageWidth/2, planBg.frame.origin.y + planBg.frame.size.height + 20, bgImageWidth, bgImageWidth/4+5);
iWantPlan.titleLabel.font = [UIFont systemFontOfSize:20];
[iWantPlan addTarget:self action:@selector(goToPersonalDetails) forControlEvents:UIControlEventTouchDown];
[self.view addSubview:iWantPlan];

iWantPlan.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;
iWantPlan.imageView.frame = CGRectMake(bgImageWidth - 20, 10, 25, 25);
UIImage *viImage = [UIImage imageNamed:@"Icon_V.png"];
UIImage *viImageTap = [UIImage imageNamed:@"Icon_V_Tap.png"];
[iWantPlan setImage:viImage forState:UIControlStateNormal];
[iWantPlan setImage:viImageTap forState:UIControlStateSelected];

有解决办法吗？ （顺便说一句，这真的很令人沮丧:)

【参考方案1】：

使用：imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal 确定你没有蓝色背景：

UIImage *viImage = [[UIImage imageNamed:@"Icon_V.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage *viImageTap = [[UIImage imageNamed:@"Icon_V_Tap.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

来自Apple Documentation UIImageRenderingMode: 始终绘制原始图像，而不将其视为模板：UIImageRenderingModeAlwaysOriginal

另外，这可以帮助你：

UIButton *iWantPlan = [UIButton buttonWithType:UIButtonTypeCustom];
...
[iWantPlan setImage:viImageTap forState:UIControlStateHighlighted];

【参考方案2】：

只需将按钮的类型 UIButtonTypeSystem 更改为 UIButtonTypeCustom