使用SDWebImage清除图片缓存

使用下面清除缓存的方法需要导入#import "SDImageCache.h"

//清除缓存的点击方法
- (void)clearBtnClicked:(UIButton *)sender
{
    NSString *caches = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];   
    //调用清除方法
    [self clearCache:caches];
}

//清除缓存文件

- (void)clearCache:(NSString *)path{
    NSFileManager *fileManager=[NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:path]) {
        NSArray *childerFiles=[fileManager subpathsAtPath:path];
        for (NSString *fileName in childerFiles) {
            //如有需要，加入条件，过滤掉不想删除的文件
            NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
            [fileManager removeItemAtPath:absolutePath error:nil];
        }
    }
    [[SDImageCache sharedImageCache] cleanDisk];
}


- (long long)fileSizeAtPath:(NSString *)filePath{
    NSFileManager* manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:filePath]){
        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
    }
    return 0;
}

//遍历文件夹获得文件夹大小，返回多少M
- (float)folderSizeAtPath:(NSString *)folderPath{
    NSFileManager* manager = [NSFileManager defaultManager];
    if (![manager fileExistsAtPath:folderPath]) return 0;
    NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
    NSString* fileName;
    long long folderSize = 0;
    while ((fileName = [childFilesEnumerator nextObject]) != nil){
        NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
        folderSize += [self fileSizeAtPath:fileAbsolutePath];
    }
    return folderSize/(1024.0*1024.0);
}