iOS缓存清理

1.清除本地数据库中的数据

2. 清除Caches目录下文件

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES);
    NSString *cachesDir = [paths objectAtIndex:0];
    NSFileManager* manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:cachesDir]) {
        [manager removeItemAtPath:cachesDir
                            error:nil];
    }

3. 清除你所保存的缓存文件

   NSArray *pathArray = @[@"NormalBidListInfo.txt",@"ActivityBidListInfo.txt"];
            for (NSString *pathName in pathArray) {
                NSString *path = [PathService getDocumentsFilePath:pathName];
                [FileSaveTool deleteDateWithFilePath:path];
            }

4.清理SDWebImage缓存

获取图片的缓存大小

[SDImageCache sharedImageCache] getSize];

清理内存缓存，清理内存中缓存的图片资源，释放内存资源。

[[SDImageCache sharedImageCache] clearMemory];

清理磁盘缓存的接口

[[SDImageCache sharedImageCache] clearDisk];