我创建了一个自定义按钮,因为我想要一个渐变按钮。所以我用这段代码来实现它。
@implementation CustomButton
- (id)initWithFrame:(CGRect)frame
{
if((self = [super initWithFrame:frame])){
[self setupView];
}
//[self addObserver:self forKeyPath:@"highlighted" options:0 context:nil];
return self;
}
- (void)awakeFromNib {
[self setupView];
}
# pragma mark - main
- (void)setupView
{
self.layer.cornerRadius = 10;
self.layer.borderWidth = 1.0;
self.layer.borderColor = [UIColor colorWithRed:167.0/255.0 green:140.0/255.0 blue:98.0/255.0 alpha:0.25].CGColor;
self.layer.shadowColor = [UIColor blackColor].CGColor;
self.layer.shadowRadius = 1;
[self clearHighlightView];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = self.layer.bounds;
gradient.cornerRadius = 10;
gradient.colors = [NSArray arrayWithObjects:
(id)[UIColor colorWithWhite:1.0f alpha:0.4f].CGColor,
(id)[UIColor colorWithWhite:1.0f alpha:0.2f].CGColor,
(id)[UIColor colorWithWhite:0.75f alpha:0.2f].CGColor,
(id)[UIColor colorWithWhite:0.4f alpha:0.2f].CGColor,
(id)[UIColor colorWithWhite:1.0f alpha:0.4f].CGColor, nil];
// float height = gradient.frame.size.height;
gradient.locations = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:0.0f],
[NSNumber numberWithFloat:0.5f],
[NSNumber numberWithFloat:0.5f],
[NSNumber numberWithFloat:0.8f],
[NSNumber numberWithFloat:1.0f],
nil];
[gradient setBackgroundColor:[UIColor redColor].CGColor];
[self.layer insertSublayer:gradient atIndex:0];
}
现在渐变已经完成。但是当我按下这个按钮时,它上面没有突出显示的状态。
我只想按下时它的颜色已经加深了。有谁知道如何实现这个?谢谢