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- (float)checkTmpSize {
    float totalSize = 0;
    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:diskCachePath];
    for (NSString *fileName in fileEnumerator) {
       NSString *filePath = [diskCachePath stringByAppendingPathComponent:fileName];
       NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];
       unsigned long long length = [attrs fileSize];
      totalSize += length / 1024.0 / 1024.0;
    } // NSLog(@"tmp size is %.2f",totalSize); return totalSize;
}

3.在设置里这样使用

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原文地址：http://www.cnblogs.com/cdp-snail/p/4918593.html