图片缓存计算以及清理

SDWebImage缓存的相关操作主要通过SDImageCache这个类控制

// 单例形式存在
SDImageCache * cache = [SDImageCache sharedImageCache];
double imgeCache = [[SDImageCache sharedImageCache] getSize];
imgeCache += [self getLogFileSize];    
///换算成MB结尾的数据量单位
double theCache = imgeCache/1024.0/1024.0;

///清除掉图片的缓存
   [[SDImageCache sharedImageCache] clearDiskOnCompletion:^{
            [MBProgressHUD hideHUD];
            [MBProgressHUD showSuccess:@"清除成功"];
        }];

获取APP中的文件大小

- (long)getLogFileSize {
   long fileSize = 0;
   NSFileManager *manager = [NSFileManager defaultManager];
   NSError *error = nil;
   NSArray *contents = [manager contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@/Documents",NSHomeDirectory()] error:&error];
   if (error) {
       return fileSize;
   }
   for (NSString *fileName in contents) {
       if ([fileName hasSuffix:@".log"]) {
           NSString *filePath = [NSString stringWithFormat:@"%@/Documents/%@",NSHomeDirectory(),fileName];
           fileSize += [[[manager attributesOfItemAtPath:filePath error:nil] objectForKey:NSFileSize] longValue];
       }
   }
   return fileSize;
   }            

删除当前的文件缓存

- (void)deleteLogFiles{
    NSFileManager *manager = [NSFileManager defaultManager];
    NSError *error = nil;
    NSArray *contents = [manager contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@/Documents",NSHomeDirectory()] error:&error];
    if (error) {
        return;
    }
    for (NSString *fileName in contents) {
        if ([fileName hasSuffix:@".log"]) {
            NSString *filePath = [NSString stringWithFormat:@"%@/Documents/%@",NSHomeDirectory(),fileName];
            [manager removeItemAtPath:filePath error:nil];
        }
    }
}
///其他的log文件的缓存大小

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