将CAGradientLayer当做mask使用
效果
源码
https://github.com/YouXianMing/Animations
//
// CAGradientView.h
// MaskView
//
// Created by YouXianMing on 16/2/15.
// Copyright © 2016年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface CAGradientView : UIView
/**
* CAGradientLayer's colors.
*/
@property (nonatomic, strong) NSArray *colors;
/**
* CAGradientLayer's locations.
*/
@property (nonatomic, strong) NSArray *locations;
/**
* CAGradientLayer's startPoint.
*/
@property (nonatomic) CGPoint startPoint;
/**
* CAGradientLayer's endPoint.
*/
@property (nonatomic) CGPoint endPoint;
@end//
// CAGradientView.m
// MaskView
//
// Created by YouXianMing on 16/2/15.
// Copyright © 2016年 YouXianMing. All rights reserved.
//
#import "CAGradientView.h"
@interface CAGradientView () {
CAGradientLayer *_gradientLayer;
}
@end
@implementation CAGradientView
+ (Class)layerClass {
return [CAGradientLayer class];
}
- (instancetype)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
_gradientLayer = (CAGradientLayer *)self.layer;
}
return self;
}
#pragma mark - 重写setter,getter方法
@synthesize colors = _colors;
- (void)setColors:(NSArray *)colors {
_colors = colors;
// 将color转换成CGColor
NSMutableArray *cgColors = [NSMutableArray array];
for (UIColor *tmp in colors) {
id cgColor = (__bridge id)tmp.CGColor;
[cgColors addObject:cgColor];
}
// 设置Colors
_gradientLayer.colors = cgColors;
}
- (NSArray *)colors {
return _colors;
}
@synthesize locations = _locations;
- (void)setLocations:(NSArray *)locations {
_locations = locations;
_gradientLayer.locations = _locations;
}
- (NSArray *)locations {
return _locations;
}
@synthesize startPoint = _startPoint;
- (void)setStartPoint:(CGPoint)startPoint {
_startPoint = startPoint;
_gradientLayer.startPoint = startPoint;
}
- (CGPoint)startPoint {
return _startPoint;
}
@synthesize endPoint = _endPoint;
- (void)setEndPoint:(CGPoint)endPoint {
_endPoint = endPoint;
_gradientLayer.endPoint = endPoint;
}
- (CGPoint)endPoint {
return _endPoint;
}
@end细节
