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);

}