本文主要是介绍[iOS]UIView+AZGradient，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
在项目中看见一个比较好的扩展, 用来处理UIView的渐变色问题.
搜索了一下应该是这个大佬写的https://www.jianshu.com/p/e7c9e94e165b
这里也用demo验证一下备份收藏
资源下载,会Copy的同学就不用下载了,不能免积分这只是自己用来下载的.
@implementation InfoViewController- (void)viewDidLoad {[super viewDidLoad];[_view1 az_setGradientBackgroundWithColors:@[[UIColor redColor],[UIColor blueColor]] locations:nil startPoint:CGPointMake(0, 0) endPoint:CGPointMake(0, 1)];[_view2 az_setGradientBackgroundWithColors:@[[UIColor redColor],[UIColor blueColor]] locations:nil startPoint:CGPointMake(0, 0) endPoint:CGPointMake(1, 1)];[_view3 az_setGradientBackgroundWithColors:@[[UIColor redColor],[UIColor orangeColor],[UIColor blackColor],[UIColor blueColor]] locations:@[[NSNumber numberWithFloat:0] ,[NSNumber numberWithFloat:0.4] ,[NSNumber numberWithFloat:0.8] ,[NSNumber numberWithFloat:1]] startPoint:CGPointMake(0, 0) endPoint:CGPointMake(1, 0)];UIView *newView = [UIView az_gradientViewWithColors:@[[UIColor redColor],[UIColor blueColor]] locations:nil startPoint:CGPointMake(1, 0) endPoint:CGPointMake(0, 1)];newView.frame = _view4.bounds;[_view4 addSubview:newView];
}@end示意图:
UIView+AZGradient
//
// UIView+AZGradient.h
// AZCategory
//
// Created by Alfred Zhang on 2017/6/29.
// Copyright © 2017年 Alfred Zhang. All rights reserved.
//#import <UIKit/UIKit.h>@interface UIView (AZGradient)/* The array of CGColorRef objects defining the color of each gradient* stop. Defaults to nil. Animatable. */@property(nullable, copy) NSArray *az_colors;/* An optional array of NSNumber objects defining the location of each* gradient stop as a value in the range [0,1]. The values must be* monotonically increasing. If a nil array is given, the stops are* assumed to spread uniformly across the [0,1] range. When rendered,* the colors are mapped to the output colorspace before being* interpolated. Defaults to nil. Animatable. */@property(nullable, copy) NSArray<NSNumber *> *az_locations;/* The start and end points of the gradient when drawn into the layer's* coordinate space. The start point corresponds to the first gradient* stop, the end point to the last gradient stop. Both points are* defined in a unit coordinate space that is then mapped to the* layer's bounds rectangle when drawn. (I.e. [0,0] is the bottom-left* corner of the layer, [1,1] is the top-right corner.) The default values* are [.5,0] and [.5,1] respectively. Both are animatable. */@property CGPoint az_startPoint;
@property CGPoint az_endPoint;+ (UIView *_Nullable)az_gradientViewWithColors:(NSArray<UIColor *> *_Nullable)colors locations:(NSArray<NSNumber *> *_Nullable)locations startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint;- (void)az_setGradientBackgroundWithColors:(NSArray<UIColor *> *_Nullable)colors locations:(NSArray<NSNumber *> *_Nullable)locations startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint;@end
//
// UIView+AZGradient.m
// AZCategory
//
// Created by Alfred Zhang on 2017/6/29.
// Copyright © 2017年 Alfred Zhang. All rights reserved.
//#import "UIView+AZGradient.h"
#import <objc/runtime.h>@implementation UIView (AZGradient)+ (Class)layerClass {return [CAGradientLayer class];
}+ (UIView *)az_gradientViewWithColors:(NSArray<UIColor *> *)colors locations:(NSArray<NSNumber *> *)locations startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint {UIView *view = [[self alloc] init];[view az_setGradientBackgroundWithColors:colors locations:locations startPoint:startPoint endPoint:endPoint];return view;
}- (void)az_setGradientBackgroundWithColors:(NSArray<UIColor *> *)colors locations:(NSArray<NSNumber *> *)locations startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint {NSMutableArray *colorsM = [NSMutableArray array];for (UIColor *color in colors) {[colorsM addObject:(__bridge id)color.CGColor];}self.az_colors = [colorsM copy];self.az_locations = locations;self.az_startPoint = startPoint;self.az_endPoint = endPoint;
}#pragma mark- Getter&Setter- (NSArray *)az_colors {return objc_getAssociatedObject(self, _cmd);
}- (void)setAz_colors:(NSArray *)colors {objc_setAssociatedObject(self, @selector(az_colors), colors, OBJC_ASSOCIATION_COPY_NONATOMIC);if ([self.layer isKindOfClass:[CAGradientLayer class]]) {[((CAGradientLayer *)self.layer) setColors:self.az_colors];}
}- (NSArray<NSNumber *> *)az_locations {return objc_getAssociatedObject(self, _cmd);
}- (void)setAz_locations:(NSArray<NSNumber *> *)locations {objc_setAssociatedObject(self, @selector(az_locations), locations, OBJC_ASSOCIATION_COPY_NONATOMIC);if ([self.layer isKindOfClass:[CAGradientLayer class]]) {[((CAGradientLayer *)self.layer) setLocations:self.az_locations];}
}- (CGPoint)az_startPoint {return [objc_getAssociatedObject(self, _cmd) CGPointValue];
}- (void)setAz_startPoint:(CGPoint)startPoint {objc_setAssociatedObject(self, @selector(az_startPoint), [NSValue valueWithCGPoint:startPoint], OBJC_ASSOCIATION_RETAIN_NONATOMIC);if ([self.layer isKindOfClass:[CAGradientLayer class]]) {[((CAGradientLayer *)self.layer) setStartPoint:self.az_startPoint];}
}- (CGPoint)az_endPoint {return [objc_getAssociatedObject(self, _cmd) CGPointValue];
}- (void)setAz_endPoint:(CGPoint)endPoint {objc_setAssociatedObject(self, @selector(az_endPoint), [NSValue valueWithCGPoint:endPoint], OBJC_ASSOCIATION_RETAIN_NONATOMIC);if ([self.layer isKindOfClass:[CAGradientLayer class]]) {[((CAGradientLayer *)self.layer) setEndPoint:self.az_endPoint];}
}@end@implementation UILabel (AZGradient)+ (Class)layerClass {return [CAGradientLayer class];
}@end
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