单击时更改按钮背景颜色

Question

我创建了一个按钮,我希望在用户点击时更改其颜色.我看到了选项"setimagebackground ... forstate ......",但没有其他选项可以改变背景颜色.我在viewdidload中更改了y按钮的值,当我使用"settint color:[uicolor redcolor]"时,没有任何反应.我该怎么解决？这是我的代码:

    button1.layer.borderColor = [[UIColor purpleColor]CGColor];
    button1.layer.cornerRadius = 8.0f;
    button1.layer.masksToBounds = YES;
    button1.layer.borderWidth = 1.0f; 
    [button1.tintColor = [UIColor redColor]CGColor];
    [button1 setTintColor:[UIColor blueColor]];
    [button1 setTitleColor:[UIColor cyanColor] forState:UIControlStateNormal];
    [button1 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
    [button1 setTintColor:[UIColor redColor]];

谢谢!

Answer 1

带图像：

[button1 setBackgroundImage:[UIImage imageNamed:@"redButton.png"]];

没有图像：

[button1 setBackgroundColor:[UIColor redColor] ];

这样你就可以得到圆角边框：

     CALayer * layer = [button1 layer];     
     [layer setCornerRadius:8.0f];
     [layer setMasksToBounds:YES];
     [layer setBorderWidth:1.0f];
     [layer setBorderColor:[[UIColor whiteColor] CGColor]];
     button1.backgroundColor = [UIColor redColor];

对于选中状态的子类UIButton这样：

在.h文件中：

@interface MyButton : UIButton 
{
@private
    NSMutableDictionary *backgroundStates;
@public

}

- (void) setBackgroundColor:(UIColor *) _backgroundColor forState:(UIControlState) _state;
- (UIColor*) backgroundColorForState:(UIControlState) _state;

@end

在 .m 文件中：

#import "MyButton.h"


@implementation MyButton

- (void) setBackgroundColor:(UIColor *) _backgroundColor forState:(UIControlState) _state {
    if (backgroundStates == nil) 
        backgroundStates = [[NSMutableDictionary alloc] init];

    [backgroundStates setObject:_backgroundColor forKey:[NSNumber numberWithInt:_state]];

    if (self.backgroundColor == nil)
        [self setBackgroundColor:_backgroundColor];
}

- (UIColor*) backgroundColorForState:(UIControlState) _state {
    return [backgroundStates objectForKey:[NSNumber numberWithInt:_state]];
}

#pragma mark -
#pragma mark Touches

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [super touchesBegan:touches withEvent:event];

    UIColor *selectedColor = [backgroundStates objectForKey:[NSNumber numberWithInt:UIControlStateHighlighted]];
    if (selectedColor) {
        CATransition *animation = [CATransition animation];
        [animation setType:kCATransitionFade];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        [self.layer addAnimation:animation forKey:@"EaseOut"];
        self.backgroundColor = selectedColor;
    }
}

- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    [super touchesCancelled:touches withEvent:event];

    UIColor *normalColor = [backgroundStates objectForKey:[NSNumber numberWithInt:UIControlStateNormal]];
    if (normalColor) {
        CATransition *animation = [CATransition animation];
        [animation setType:kCATransitionFade];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        [self.layer addAnimation:animation forKey:@"EaseOut"];
        self.backgroundColor = normalColor;
    }
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [super touchesEnded:touches withEvent:event];

    UIColor *normalColor = [backgroundStates objectForKey:[NSNumber numberWithInt:UIControlStateNormal]];
    if (normalColor) {
        CATransition *animation = [CATransition animation];
        [animation setType:kCATransitionFade];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        [self.layer addAnimation:animation forKey:@"EaseOut"];
        self.backgroundColor = normalColor;
    }
}

- (void) dealloc {
    [backgroundStates release];
    [super dealloc];
}

@end

然后在你的 ViewController 中（记住包含你的自定义类）你可以这样设置颜色：

[button1 setBackgroundColor:[UIColor colorWithRed:0.8 green:0.7 blue:0.6 alpha:1.0] forState:UIControlStateHighlighted];