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 = 1024k    if (size < 1024) {// 小于1k        if (size <200){                        return [NSString stringWithFormat:@"%@B",@"0"];        }        return [NSString stringWithFormat:@"%ldB",(long)size];    }else if (size < 1024 * 1024){// 小于1m        CGFloat aFloat = size/1024;        return [NSString stringWithFormat:@"%.0fK",aFloat];    }else if (size < 1024 * 1024 * 1024){// 小于1G        CGFloat 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];         }    }    }