Object-C 计算缓存大小

//计算缓存大小
- (CGFloat)calculateCache{
    CGFloat folderSize = 0;
    //获取路径
    NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)firstObject];
    //获取所有文件的数组
    NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachePath];
    NSLog(@"文件数：%ld",files.count);
    for(NSString *path in files) {
        NSString*filePath = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",path]];
        //累加
        folderSize += [[NSFileManager defaultManager]attributesOfItemAtPath:filePath error:nil].fileSize;
    }
    //转换为M为单位
    CGFloat sizeM = folderSize /1024.0/1024.0;
    return sizeM;
}

//清除缓存
- (void)removeCache{
    //获取路径
    NSString*cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    //返回路径中的文件数组
    NSArray*files = [[NSFileManager defaultManager]subpathsAtPath:cachePath];
    NSLog(@"文件数：%ld",[files count]);
    for(NSString *p in files){
        NSError*error;
        NSString*path = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",p]];
        if([[NSFileManager defaultManager]fileExistsAtPath:path]) {
            BOOL isRemove = [[NSFileManager defaultManager]removeItemAtPath:path error:&error];
            if(isRemove) {
                NSLog(@"清除成功");
            } else {
                NSLog(@"清除失败");
            } 
        }
    }
}

Swift计算缓存

//统计缓存文件大小
func fileSizeOfCache()-> Int {
    // 取出cache文件夹目录 缓存文件都在这个目录下 -->缓存目录路径
    let cachePath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first
    print(cachePath)
    // 取出文件夹下所有文件数组
    let fileArr = FileManager.default.subpaths(atPath: cachePath!)
    //快速枚举出所有文件名 计算文件大小
    var size = 0
    for file in fileArr! {
        // 把文件名拼接到路径中
        let path = cachePath?.appending("/\(file)")
        // 取出文件属性
        let floder = try! FileManager.default.attributesOfItem(atPath: path!)
        // 用元组取出文件大小属性
        for (abc, bcd) in floder {
            // 累加文件大小
            if abc == FileAttributeKey.size {
                size += (bcd as AnyObject).integerValue
            }
        }
    }
    let mm = size / 1024 / 1024
    return mm
}

//删除缓存文件
func clearCache() {
    // 取出cache文件夹目录 缓存文件都在这个目录下
    let cachePath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first
    
    // 取出文件夹下所有文件数组
    let fileArr = FileManager.default.subpaths(atPath: cachePath!)
    
    // 遍历删除
    for file in fileArr! {
        let path = cachePath?.appending("/\(file)")
        if FileManager.default.fileExists(atPath: path!) {
            do {
                try FileManager.default.removeItem(atPath: path!)
            } catch {
                
            }
        }
    }
}