demo地址
运行效果:
ZWImageView.h中代码:
#import
@interface ZWImageView : UIView
/**
* path:形状
*/
@property (nonatomic, assign) CGPathRef path;
/**
* image:图片
*/
@property (nonatomic, strong) UIImage *image;
- (instancetype)init;
- (instancetype)initWithFrame:(CGRect)frame;
- (instancetype)initWithFrame:(CGRect)frame path:(CGPathRef)path image:(UIImage *)image;
@end
ZWImageView.m中代码:
#import "ZWImageView.h"
@implementation ZWImageView
{
CAShapeLayer *maskLayer;
CALayer *contentLayer;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
- (instancetype)init{
self = [super init];
if (self) {
self.backgroundColor = [UIColor clearColor];
[self setUpLayers];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
[self setUpLayers];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame path:(CGPathRef)path image:(UIImage *)image{
self = [super initWithFrame:frame];
if (self) {
_path = path;
_image = image;
[self setUpLayers];
}
return self;
}
- (void)setUpLayers{
maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = self.bounds;
maskLayer.fillColor = [UIColor blackColor].CGColor;
maskLayer.strokeColor = [UIColor redColor].CGColor;
//拉伸范围
// maskLayer.contentsCenter = CGRectMake(0.5, 0.5, 0.1, 0.1);
maskLayer.contentsScale = [UIScreen mainScreen].scale;
maskLayer.path = _path;
contentLayer = [CALayer layer];
contentLayer.frame = self.bounds;
//居中裁剪
contentLayer.contentsGravity = kCAGravityResizeAspectFill;
contentLayer.mask = maskLayer;
contentLayer.contents = (__bridge id _Nullable)(_image.CGImage);
[self.layer addSublayer:contentLayer];
}
- (void)setFrame:(CGRect)frame{
[super setFrame:frame];
maskLayer.frame = self.bounds;
contentLayer.frame = self.bounds;
}
- (void)setPath:(CGPathRef)path{
_path = path;
maskLayer.path = path;
}
- (void)setImage:(UIImage *)image{
_image = image;
contentLayer.contents = (__bridge id _Nullable)(image.CGImage);
}
@end
使用方法:
//三角形
UIBezierPath *path1 = [[UIBezierPath alloc] init];
path1.lineCapStyle = kCGLineCapRound;
path1.lineJoinStyle = kCGLineJoinRound;
[path1 moveToPoint:CGPointMake(25, 0)];
[path1 addLineToPoint:CGPointMake(0, 50)];
[path1 addLineToPoint:CGPointMake(50, 50)];
[path1 fill];
ZWImageView *imageView1 = [[ZWImageView alloc] initWithFrame:CGRectMake(20, 100, 50, 50) path:path1.CGPath image:[UIImage imageNamed:@"示例图"]];
[self.view addSubview:imageView1];
//波浪
UIBezierPath *path2 = [[UIBezierPath alloc] init];
path2.lineCapStyle = kCGLineCapRound;
path2.lineJoinStyle = kCGLineJoinRound;
[path2 moveToPoint:CGPointMake(0, 50)];
[path2 addLineToPoint:CGPointMake(0, 25)];
// [path addArcWithCenter:CGPointMake(50, 50) radius:50 startAngle:M_PI endAngle:M_PI_2 clockwise:YES];
[path2 addCurveToPoint:CGPointMake(50, 25) controlPoint1:CGPointMake(15, 15) controlPoint2:CGPointMake(35, 35)];
[path2 addLineToPoint:CGPointMake(50, 50)];
[path2 fill];
ZWImageView *imageView2 = [[ZWImageView alloc] initWithFrame:CGRectMake(120, 100, 50, 50) path:path2.CGPath image:[UIImage imageNamed:@"示例图"]];
[self.view addSubview:imageView2];
//椭圆形
UIBezierPath *path3 = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 5, 50, 100)];
[path3 fill];
ZWImageView *imageView3 = [[ZWImageView alloc] initWithFrame:CGRectMake(220, 100, 50, 120) path:path3.CGPath image:[UIImage imageNamed:@"示例图"]];
[self.view addSubview:imageView3];
//扇形
UIBezierPath *path4 = [[UIBezierPath alloc] init];
[path4 moveToPoint:CGPointMake(50, 100)];
[path4 addLineToPoint:CGPointMake(0, 50)];
[path4 addArcWithCenter:CGPointMake(50, 100) radius:70.7 startAngle:M_PI_4 * 5 endAngle:M_PI_4 * 7 clockwise:YES];
[path4 fill];
ZWImageView *imageView4 = [[ZWImageView alloc] initWithFrame:CGRectMake(20, 180, 100, 100) path:path4.CGPath image:[UIImage imageNamed:@"示例图"]];
[self.view addSubview:imageView4];
//四分之三圆
UIBezierPath *path5 = [[UIBezierPath alloc] init];
[path5 moveToPoint:CGPointMake(0, 100)];
[path5 addLineToPoint:CGPointMake(0, 50)];
[path5 addArcWithCenter:CGPointMake(50, 50) radius:50 startAngle:M_PI endAngle:M_PI_2 clockwise:YES];
[path5 fill];
ZWImageView *imageView5 = [[ZWImageView alloc] initWithFrame:CGRectMake(20, 300, 100, 100) path:path5.CGPath image:[UIImage imageNamed:@"示例图"]];
[self.view addSubview:imageView5];
ZWImageview
的path
属性为CGPathRef
类型,可以传入任意想要的形状。