iOS文件的剪切

步骤:

• 1.获取需要剪切文件(夹)的路径from,和要剪切到哪里的路径to
• 2.获取文件管理者对象(单例)
• 3.利用文件管理者对象获取数组
• 4.遍历数组,拼接文件,利用文件管理者剪切文件

方法一:

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{

    NSString *from = @"/Users/chuanzhang/Desktop/from";
    NSString *to = @"/Users/chuanzhang/Desktop/to";

    // 单例对象
    NSFileManager *manager = [NSFileManager defaultManager];
    NSArray *subPathA = [manager subpathsAtPath:from]; // 文件夹内所有的文件名称
    NSLog(@"%@",subPathA);

    for (int i = 0; i<subPathA.count; i++) {
        // 拼接路径
        NSString *fileName = subPathA[i];
        NSString *fullPath = [from stringByAppendingPathComponent:fileName]; // 这个方法会自动加斜杠

        NSString *toPath = [to stringByAppendingPathComponent:fileName];
        NSLog(@"%@",toPath);

        [manager moveItemAtPath:fullPath toPath:toPath error:nil];
    }

}

方法二:文件剪切属于耗时操作,应该放在子线程中进行

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{

    NSString *from = @"/Users/chuanzhang/Desktop/from";
    NSString *to = @"/Users/chuanzhang/Desktop/to";

    NSFileManager *manager = [NSFileManager defaultManager];
    NSArray *subPathA = [manager subpathsAtPath:from]; // 文件夹内所有的文件名称
   // NSLog(@"%@",subPathA);
    NSInteger count = [subPathA count];

   // dispatch_queue_t queue = dispatch_get_global_queue(0, 0);

  //  GCD迭代,遍历数组
   dispatch_queue_t queue = dispatch_queue_create("com.chuanzhang", DISPATCH_QUEUE_CONCURRENT);
        dispatch_apply(count, queue, ^(size_t i) {

            // 拼接路径
            NSString *fileName = subPathA[i];
            NSString *fullPath = [from stringByAppendingPathComponent:fileName]; // 这个方法会自动加斜杠

            NSString *toPath = [to stringByAppendingPathComponent:fileName];
           // NSLog(@"%@",toPath);
            [manager moveItemAtPath:fullPath toPath:toPath error:nil];

            NSLog(@"%@--",[NSThread currentThread]);
        });
}

• 注意:如图,GCD迭代会开启子线程,但是也会在主线程中执行