heart.png
利用一张黑底透明的图片作为CALayer的mask，可以绘制出相同形状不同颜色的图形。
#import "ICEView.h"
@interface ICEView()
@property (nonatomic, strong) UIButton *btn;
@property (nonatomic, strong) CALayer *iceLayer;
@property (nonatomic, strong) CAKeyframeAnimation *frameAnimate;
@property (nonatomic, assign) BOOL isSelected;
@end
@implementation ICEView
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self creatBaseView];
_isSelected = NO;
}
return self;
}
- (void)creatBaseView {
_btn = [[UIButton alloc]initWithFrame:self.bounds];
[self addSubview:_btn];
_iceLayer = [CALayer layer];
_iceLayer.frame = self.bounds;
[_btn.layer addSublayer:_iceLayer];
_iceLayer.mask = [CALayer layer];
}
- (void)layoutSubviews {
_iceLayer.frame = _btn.bounds;
_iceLayer.mask.frame = self.bounds;
_iceLayer.backgroundColor = [UIColor lightGrayColor].CGColor;
_iceLayer.mask.contents = (__bridge id _Nullable)([UIImage imageNamed:@"heart"].CGImage);
}
IMG_1170.PNG
