UIButton的ImageView的色调没有改变

Question

如何更改button.imageView的tintColor。如果我在UIImageView中使用与下面相同的渲染模式的相同图像，tintColor将发生变化，但按钮的图像视图不会发生同样的情况。是因为buttonType吗？

    UIButton *frontButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [frontButton setImage:[[UIImage imageNamed:FRONT_IMAGE] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate] forState:UIControlStateNormal];
    [frontButton.imageView setTintColor:[UIColor redColor]];
    [self addSubview:frontButton];

Answer 1

设置按钮类型"系统"，然后设置色调。这个解决方案肯定会奏效。请尝试这个

UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
 [btn setTintColor:YOUR_COLOR];
 [btn setImage:YOUR_Image];

Answer 2

尝试此代码更改按钮内部的色调：

UIButton *frontButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
UIImageView *imageV = [[UIImageView alloc] initWithImage:[UIImage imageNamed:FRONT_IMAGE]];
imageV.image = [imageV.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
imageV.tintColor = [UIColor redColor];
[frontButton setImage:imageV.image forState:UIControlStateNormal];

Answer 3

Swift 4.0

extension UIImage {
    public static func imageWithRenderingModeAlwaysTemplate(named: String) -> UIImage? {
        let image = UIImage(named: named)?.withRenderingMode(.alwaysTemplate)
        let imageView = UIImageView(image: image)
        return imageView.image
    }
}

使用

let button = UIButton.setImage(UIImage.imageWithRenderingModeAlwaysTemplate(named: ""), for: .normal)
button.tintColor = .red

Answer 4

您可以执行类似的操作

UIButton *frontButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[frontButton setImage:[[UIImage imageNamed:FRONT_IMAGE] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate] forState:UIControlStateNormal];
[frontButton setTintColor:[UIColor redColor]];
[self addSubview:frontButton];

将色调设置为按钮，若图像渲染模式为模板，则它也将获得此色调。

如果您希望按钮的色调不同而图像的色调不同，那么您应该使用一个临时图像视图，并使用渲染模式模板将图像设置为该图像视图，然后将色调设置为该视图，然后从该图像视图将图像设置至按钮。

希望这将有所帮助：）

Answer 5

我找到了答案，我只需要在设置了问题中提到的渲染模式后，将tintColor给UIButton，而不是给按钮的imageView属性。

[button setTintColor:YOUR_COLOR];

Answer 6

Xamarin iOs解决方案：

  var image = uiButton.ImageView.Image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate);
  uiButton.SetImage(image, UIControlState.Normal);
  uiButton.TintColor = effect.TintColor.ToUIColor();