//参考地址
https://blog.csdn.net/tyforfreedom/article/details/47278975
[imageView.iv sd_setImageWithURL:[NSURL URLWithString:theImage.url] placeholderImage:SharedData.imageAvatarDefaultSmall options:SDWebImageFromCacheOnly completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
theImage.image= image;
}];
当采用这种方式进行图片加载的时候，图片还会执行下载的操作，缓存到本地。这个时候要对theImage.image = image中model的image弱引用。否则会造成循环引用
#import "KLBaseModel.h"
@interfaceTAvatar :KLBaseModel
@property(nonatomic,assign) NSInteger smsID;
@property(nonatomic,assign) BOOL isGif;
@property(nonatomic,assign) NSInteger width;
@property(nonatomic,assign) NSInteger height;
@property(nonatomic,copy) NSString* url;
@property (nonatomic,strong)UIImage *image;
@property (nonatomic,weak)UIImage *image;
-(CGSize)sizeForWidth:(CGFloat)width;
@end
//注意这种赋值方式也是的(YYImage的图片加载第三方)
// [imageView.iv yy_setImageWithURL:[KLUtil getThumbAvatarWithUrl:theImage.url withHeight:_imageHeight withWidth:_imageWidth withOriginWidth:theImage.width orignHeight:theImage.height isGif:theImage.isGif] placeholder:SharedData.imageAvatarDefaultSmall options:YYWebImageOptionProgressive completion:^(UIImage * _Nullable image, NSURL * _Nonnull url, YYWebImageFromType from, YYWebImageStage stage, NSError * _Nullable error) {
// theImage.image = image;
// }];
