ios - 如何顺利移动 UIImageViews 数组？

Question

我正在研究一种座位安排应用程序。该应用程序允许管理员通过单击并移动每个座位来安排座位，然后使用每个座位的框架尺寸保存座位安排。我尝试在自定义 View 上加载 5 个 UIImageView 并移动 ImageView ，但是只有一个 ImageView 被移动。其余的 ImageView 没有移动。你能帮我解决这个问题吗？

- (void) addSeatsToTheView {

    for (int i=0; i<5; i++) {

        self.hotelImage = [[UIImageView alloc] initWithFrame:CGRectMake(5, 5, 50, 50)];
        self.hotelImage.image = [UIImage imageNamed:@"DiningIcon"];
        self.hotelImage.userInteractionEnabled = YES;
        [self.hotelImage setUserInteractionEnabled:YES];
        self.hotelImage.tag = i;
        [self.hotelView addSubview:self.hotelImage];
    }
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    if (touch.view == self.hotelImage) {
        CGPoint location = [touch locationInView:self.hotelView];
        NSLog(@"Begen Touch Location: %@", NSStringFromCGPoint(location));
        self.hotelImage.frame=CGRectMake(location.x, location.y, 50, 50);
    }
 }

 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
     UITouch *touch = [touches anyObject];
     if (touch.view == self.hotelImage) {
         CGPoint location = [touch locationInView:self.hotelView];
         NSLog(@"Begen Touch Location: %@", NSStringFromCGPoint(location));
         self.hotelImage.frame=CGRectMake(location.x, location.y, 50, 50);
     }
 }

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
     UITouch *touch = [touches anyObject];
     if (touch.view == self.hotelImage) {
         CGPoint location = [touch locationInView:self.hotelView];
         NSLog(@"Begen Touch Location: %@", NSStringFromCGPoint(location));
         self.hotelImage.frame=CGRectMake(location.x, location.y, 50, 50);
     }
 }

管理员安排好座位后，我们必须保存所有可见的 uiimageview 帧大小。谢谢。

编辑:

我尝试使用 UIPanGestureRecognizer，但是只有一个 ImageView 移动了。不知道哪里做错了？你能帮我么？谢谢。

- (void) addSeatsToTheView {

    for (int i=0; i<5; i++) {

        self.hotelImage = [[UIImageView alloc] initWithFrame:CGRectMake(5, 5, 50, 50)];
        self.hotelImage.image = [UIImage imageNamed:@"DiningIcon"];
        self.hotelImage.userInteractionEnabled = YES;
        [self.hotelImage setUserInteractionEnabled:YES];
        self.hotelImage.tag = i;
        UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(gestureRecognizerMethod:)];
        [self.hotelImage addGestureRecognizer:panGestureRecognizer];
        [self.hotelView addSubview:self.hotelImage];
    }
}

- (void)gestureRecognizerMethod:(UIPanGestureRecognizer *)recogniser
{
    if (recogniser.state == UIGestureRecognizerStateBegan || recogniser.state == UIGestureRecognizerStateChanged)
    {
        CGPoint touchLocation = [recogniser locationInView:self.hotelView];
        self.hotelImage.frame = CGRectMake(touchLocation.x, touchLocation.y, 50, 50);
    }
}

Answer 1

不要为此使用touches 方法；你会发疯的。使每个 ImageView 都具有用户交互性，并为其提供一个 UIPanGestureRecognizer。平移手势识别器的 Action 处理程序有标准代码用于跟随手指，即使 View 可拖动。

一旦你这样做了，一切都源于你对 self.hotelImage 的滥用。完全摆脱它。在您的 for 循环中，只需使用局部变量 UIImageView* hotelImage = ...。在手势识别器方法中，使用 [recogniser view] 来指代 this 手势识别器所附加的 ImageView 。之后一切都会自行解决!