Iphone uibarbuttonite亮显色调/颜色

我们是否可以在选中uibarbuttonite并将其高亮显示时更改其颜色/色调？我正在创建的应用程序将经常在户外使用，并希望它在高眩光情况下更明显，以便用户知道他实际上按下了按钮

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编辑：我想更改按钮高亮显示状态的颜色

我还没有尝试过此操作，但是您可以尝试对

UIBarButtonItem

进行子类化，然后覆盖

touchSedend:withEvent:

和

touchSeStart:withEvent:

方法，然后使用它们为

UIBarButtonItem

实例设置

tintColor

您需要将其添加到

UIBarButtonItem

子类中：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    self.tintColor = [UIColor redColor];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    self.tintColor = [UIColor blueColor];
}

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我没有尝试过这一点，但您可以尝试子类化

UIBarButtonItem

，然后覆盖

touchSedend:withEvent:

和

touchSeBegind:withEvent:

方法，然后使用它们为

UIBarButtonItem

实例设置

tintColor

您需要将其添加到

UIBarButtonItem

子类中：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    self.tintColor = [UIColor redColor];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    self.tintColor = [UIColor blueColor];
}

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UIButton是UIControl的一个子类，具有adjustsImageWhenHighlighted、showsTouchWhenHighlighted和showsTouchWhenHighlighted属性

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uibarbuttonite是UIBarItem的一个子类，没有这些。但是，它确实有一个uiBarButtonimStyle，当设置为uiBarButtonimStyleplain时，表示按钮在点击时发光（但不能指定颜色）

UIButton是UIControl的一个子类，具有adjustsImageWhenHighlighted、showsTouchWhenHighlighted和showsTouchWhenHighlighted属性

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uibarbuttonite是UIBarItem的一个子类，没有这些。但是，它确实有一个uiBarButtonimStyle，当设置为uiBarButtonimStyleplain时，表示按钮在点击时发光（但不能指定颜色）

您可以将UIBarButtonItem分为子类，并将UIButton放在其中，使用不同状态的不同背景图像颜色

- (id)initWithImage:(UIImage *)image target:(id)target action:(SEL)action
{

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = (CGRect){CGPointZero, image.size};

    [button setBackgroundImage:image forState:UIControlStateNormal];

    UIImage *highlightedImage = [image imageWithColor:[UIColor textHighlightColor]];
    [button setBackgroundImage:highlightedImage forState:UIControlStateHighlighted];
    [button setBackgroundImage:highlightedImage forState:UIControlStateSelected];

    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

    self = [self initWithCustomView:button];

    return self;

}

您需要将其放入UIImage类别：

- (UIImage *)imageWithColor:(UIColor *)color
{

    // begin a new image context, to draw our colored image onto
    UIGraphicsBeginImageContext(self.size);

    // get a reference to that context we created
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, color.CGColor);

    // translate/flip the graphics context (for transforming from CG* coords to UI* coords
    CGContextTranslateCTM(context, 0, self.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    // set the blend mode to color burn, and the original image
    CGContextSetBlendMode(context, kCGBlendModeMultiply);
    CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
    CGContextDrawImage(context, rect, self.CGImage);

    // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle
    CGContextClipToMask(context, rect, self.CGImage);
    CGContextAddRect(context, rect);
    CGContextDrawPath(context,kCGPathFill);

    // generate a new UIImage from the graphics context we drew onto
    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    //return the color-burned image

    return coloredImg;

}

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您可以将uiBarButtonim子类化，并将uiButtonim放在其中，使用不同状态的不同背景图像颜色

- (id)initWithImage:(UIImage *)image target:(id)target action:(SEL)action
{

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = (CGRect){CGPointZero, image.size};

    [button setBackgroundImage:image forState:UIControlStateNormal];

    UIImage *highlightedImage = [image imageWithColor:[UIColor textHighlightColor]];
    [button setBackgroundImage:highlightedImage forState:UIControlStateHighlighted];
    [button setBackgroundImage:highlightedImage forState:UIControlStateSelected];

    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

    self = [self initWithCustomView:button];

    return self;

}

您需要将其放入UIImage类别：

- (UIImage *)imageWithColor:(UIColor *)color
{

    // begin a new image context, to draw our colored image onto
    UIGraphicsBeginImageContext(self.size);

    // get a reference to that context we created
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, color.CGColor);

    // translate/flip the graphics context (for transforming from CG* coords to UI* coords
    CGContextTranslateCTM(context, 0, self.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    // set the blend mode to color burn, and the original image
    CGContextSetBlendMode(context, kCGBlendModeMultiply);
    CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
    CGContextDrawImage(context, rect, self.CGImage);

    // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle
    CGContextClipToMask(context, rect, self.CGImage);
    CGContextAddRect(context, rect);
    CGContextDrawPath(context,kCGPathFill);

    // generate a new UIImage from the graphics context we drew onto
    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    //return the color-burned image

    return coloredImg;

}

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有可能，但当用户将手指从屏幕上提起，从而恢复到原始颜色时，不会触碰末端吗？我希望在代码执行之前保持新颜色。这可以作为一种退步，至少可以更好地显示用户确实按下了按钮……好吧，在这种情况下，只需从我的示例中省略

touchesend:withEvent:

。？我想在方法的末尾，我可以将tintColor重置为正常。。。我会尝试一下，谢谢。可能的话，但是当用户将手指从屏幕上提起，从而恢复到原来的颜色时，不会碰到末端吗？我希望在代码执行之前保持新颜色。这可以作为一种退步，至少可以更好地显示用户确实按下了按钮……好吧，在这种情况下，只需从我的示例中省略

touchesend:withEvent:

。？我想在方法的末尾，我可以将tintColor重置为正常。。。我试试看，谢谢。