1,获取路径并进行数据的拼接

//获取缓存
- (void)caculatorSize{NSString *cacheFilePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches"];NSFileManager* manager = [NSFileManager defaultManager];_manager = manager;if (![_manager fileExistsAtPath:cacheFilePath]){NSLog(@"Null");}NSEnumerator *childFilesEnumerator = [[_manager subpathsAtPath:cacheFilePath] objectEnumerator];NSString* fileName;_fileName = fileName;long long folderSize = 0;while ((_fileName = [childFilesEnumerator nextObject]) != nil){NSString* fileAbsolutePath = [cacheFilePath stringByAppendingPathComponent:_fileName];_fileAbsolutePath = fileAbsolutePath;folderSize += [[_manager attributesOfItemAtPath:fileAbsolutePath error:nil]fileSize];}CGFloat intg = [[SDImageCache sharedImageCache] getSize];CGFloat sum = folderSize + intg;NSString * currentVolum = [NSString stringWithFormat:@"%@",[self fileSizeWithInterge:sum]];_currentVolum = currentVolum;}

2,计算缓存,根据大小添加相应单位

//计算文件大小
- (NSString *)fileSizeWithInterge:(CGFloat)size{// 1k = 1024, 1m = 1024kif (size < 1024) {// 小于1kif (size <200){return [NSString stringWithFormat:@"%@B",@"0"];}return [NSString stringWithFormat:@"%ldB",(long)size];}else if (size < 1024 * 1024){// 小于1mCGFloat aFloat = size/1024;return [NSString stringWithFormat:@"%.0fK",aFloat];}else if (size < 1024 * 1024 * 1024){// 小于1GCGFloat aFloat = size/(1024 * 1024);return [NSString stringWithFormat:@"%.2fM",aFloat];}else{CGFloat aFloat = size/(1024*1024*1024);return [NSString stringWithFormat:@"%.1fG",aFloat];}
}

3,清除缓存

//清除缓存
- (void)cleanTheCaheForWebView{NSString *cacheFilePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches"];NSEnumerator *childFilesEnumerator = [[_manager subpathsAtPath:cacheFilePath] objectEnumerator];NSString *fileOne;while ((fileOne = [childFilesEnumerator nextObject]) != nil){NSString* fileAbsolutePath = [cacheFilePath stringByAppendingPathComponent:fileOne];//过滤掉不想清除的文件if ([fileAbsolutePath rangerOfString:@"JPUSH"].location != NSNotFound){}else{[_manager removeItemAtPath:fileAbsolutePath error:nil];}}}