本文实例为大家分享了iOS实现UIImageView的分类代码，供大家参考，具体内容如下
一.Objective-C版
.h文件
#import <Foundation/Foundation.h>#import <UIKit/UIKit.h>#import <QuartzCore/QuartzCore.h>/** * 这个分类为UIImageView添加一些有用的方法 */@interface UIImageView (WLKit)/** * 创建一个UIImageView * * @param image UIImageView的图片 * @param rect UIImageView的坐标 * * @return 返回一个UIImageView */+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image frame:(CGRect)rect;/** * 创建一个UIImageView * * @param image UIImageView的图片 * @param size UIImageView的大小 * @param center UIImageView的中心 * * @return 返回一个UIImageView */+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image size:(CGSize)size center:(CGPoint)center;/** * 创建一个UIImageView * * @param image UIImageView的图片 * @param center UIImageView的中心 * * @return Returns the created UIImageView */+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image center:(CGPoint)center;/** * Create an UIImageView with an image and use it as a template with the given color * * @param image UIImageView image * @param tintColor UIImageView tint color * * @return Returns the created UIImageView */+ (instancetype _Nonnull)imageViewWithImageAsTemplate:(UIImage *_Nonnull)image tintColor:(UIColor *_Nonnull)tintColor;/** * Create a drop shadow effect * * @param color Shadow's color * @param radius Shadow's radius * @param offset Shadow's offset * @param opacity Shadow's opacity */- (void)setImageShadowColor:(UIColor *_Nonnull)color radius:(CGFloat)radius offset:(CGSize)offset opacity:(CGFloat)opacity;/** * Mask the current UIImageView with an UIImage * * @param image The mask UIImage */- (void)setMaskImage:(UIImage *_Nonnull)image;@end
.m文件
#import "UIImageView+WLKit.h"@implementation UIImageView (WLKit)+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image frame:(CGRect)rect{ UIImageView *_image = [[UIImageView alloc] init]; [_image setFrame:rect]; [_image setImage:image]; return _image;}+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image size:(CGSize)size center:(CGPoint)center{ UIImageView *_image = [[UIImageView alloc] init]; [_image setFrame:CGRectMake(0, 0, size.width, size.height)]; [_image setImage:image]; [_image setCenter:center]; return _image;}+ (instancetype _Nonnull)imageViewWithImage:(UIImage *_Nonnull)image center:(CGPoint)center{ UIImageView *_image = [[UIImageView alloc] init]; [_image setFrame:CGRectMake(0, 0, image.size.width, image.size.height)]; [_image setImage:image]; [_image setCenter:center]; return _image;}+ (instancetype _Nonnull)imageViewWithImageAsTemplate:(UIImage *_Nonnull)image tintColor:(UIColor *_Nonnull)tintColor{ UIImageView *_image = [[UIImageView alloc] init]; image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]; [_image setImage:image]; [_image setTintColor:tintColor]; return _image;}- (void)setImageShadowColor:(UIColor *_Nonnull)color radius:(CGFloat)radius offset:(CGSize)offset opacity:(CGFloat)opacity{ self.layer.shadowColor = color.CGColor; self.layer.shadowRadius = radius; self.layer.shadowOffset = offset; self.layer.shadowOpacity = opacity; self.clipsToBounds = NO;}- (void)setMaskImage:(UIImage *_Nonnull)image{ CALayer *mask = [CALayer layer]; mask.contents = (id)[image CGImage]; mask.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height); self.layer.mask = mask; self.layer.masksToBounds = YES;}- (void)setAlpha:(CGFloat)alpha{ if ([self.superview isKindOfClass:[UITableView class]]) { if (self.superview.tag == 836913) { if (alpha == 0 && self.autoresizingMask == UIViewAutoresizingFlexibleLeftMargin) { if (self.frame.size.width < 10 && self.frame.size.height > self.frame.size.width) { UIScrollView *sc = (UIScrollView*)self.superview; if (sc.frame.size.height < sc.contentSize.height) { [super setAlpha:0.5]; return; } } } } if (self.superview.tag == 836914) { if (alpha == 0 && self.autoresizingMask == UIViewAutoresizingFlexibleTopMargin) { if (self.frame.size.height < 10 && self.frame.size.height < self.frame.size.width) { UIScrollView *sc = (UIScrollView*)self.superview; if (sc.frame.size.width < sc.contentSize.width) { return; } } } } } [super setAlpha:alpha];}@end
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