ios - 如何保存 touchesBegan touchLocation 值

Question

如何保存 touchesBegan 值。我正在使用 UItouch 移动 5 个 UIImageView，当您将 imageView 放在正确的位置时，imageView 会保持在正确的位置。但是如果你没有把它放在正确的位置，imageView 应该跳回到 touchesBegan 位置。

这是我使用的一些代码:

ViewDidLoad:

[super viewDidLoad];
// Do any additional setup after loading the view.

//Create an array with the rectangles used for the frames
NSMutableArray *indexArray = [NSMutableArray arrayWithObjects:
                              [NSValue valueWithCGRect:CGRectMake(44, 692, 308, 171)],
                              [NSValue valueWithCGRect:CGRectMake(31, 835, 308, 171)],
                              [NSValue valueWithCGRect:CGRectMake(433, 681, 308, 171)],
                              [NSValue valueWithCGRect:CGRectMake(258, 774, 308, 171)],
                              [NSValue valueWithCGRect:CGRectMake(411, 828, 308, 171)],
                              nil];

//Randomize the array
NSUInteger count = [indexArray count];
for (NSUInteger i = 0; i < count; ++i) {
    NSUInteger nElements = count - i;
    NSUInteger n = (arc4random() % nElements) + i;
    [indexArray exchangeObjectAtIndex:i withObjectAtIndex:n];
    for (int x = 0; x < [indexArray count]; x++) {
        int randInt = (arc4random() % ([indexArray count] - x)) + x;
        [indexArray exchangeObjectAtIndex:x withObjectAtIndex:randInt];
    }

}

//Assign the frames
imageViewBil1.frame = [((NSValue *)[indexArray objectAtIndex:0]) CGRectValue];
imageViewBil2.frame = [((NSValue *)[indexArray objectAtIndex:1]) CGRectValue];
imageViewBil3.frame = [((NSValue *)[indexArray objectAtIndex:2]) CGRectValue];
imageViewBil4.frame = [((NSValue *)[indexArray objectAtIndex:3]) CGRectValue];
imageViewBil5.frame = [((NSValue *)[indexArray objectAtIndex:4]) CGRectValue];


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

UITouch *touch = [[event allTouches] anyObject];

CGPoint touchLocation = [touch locationInView:self.view];

if ([touch view] == imageViewBil1) { // If touched view is imageViewBil1 , then assign it its new location

    //imageViewBil1.center = touchLocation;
    [self.view bringSubviewToFront:imageViewBil1];
    NSLog(@"%@", NSStringFromCGPoint(touchLocation));


   }
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];

CGPoint touchLocation = [touch locationInView:self.view];
//NSLog(@"%@", NSStringFromCGPoint(touchLocation));

if ([touch view] == imageViewBil1 && imageViewBil1.tag == 0) {

    //imageViewBil1.tag=0;

    if ((touchLocation.x >= 190 && touchLocation.x <= 260) && (touchLocation.y  >= 90 && touchLocation.y <= 155)) {
        NSLog(@"bil 1");

        [UIView animateWithDuration:0.35
                              delay:0.0
                            options: UIViewAnimationOptionAllowAnimatedContent
                         animations:^{
                             imageViewBil1.frame = CGRectMake(44, 30, 308, 171);

                             imageViewBil1.tag=1;

                             NSURL *musicFile;
                             musicFile = [NSURL fileURLWithPath:
                                          [[NSBundle mainBundle]
                                           pathForResource:@"tuta"
                                           ofType:@"mp3"]];
                             myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
                             [myAudio play];
                             myAudio.delegate = self;

                         }
                         completion:^(BOOL finished){
                             NSLog(@"Auto justerad!");
                         }];

    }

    else {

        [UIView animateWithDuration:0.35
                              delay:0.0
                            options: UIViewAnimationOptionAllowAnimatedContent
                         animations:^{
                             imageViewBil1.frame = CGRectMake(44, 692, 308, 171);

                         }
                         completion:^(BOOL finished){
                             NSLog(@"Hoppar tillbaka!");
                         }];


        }
    }

目前我使用 imageViewBil1.frame = CGRectMake(44, 692, 308, 171); 在我没有将 imageView 放在正确位置时设置位置。我想要 touchesBegan 位置。

我想做这样的事情:imageViewBil1.frame = (touchesBegan.touchLocation);

或者这个:imageViewBil1.frame = [((NSValue *)[indexArray objectAtIndex:0]) CGRectValue];

Answer 1

如何在touchesBegan中将图片移动到某个点:

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

CGPoint touchPoint = [[touches anyObject] locationInView:self.view];

imageViewBil1.frame = CGRectMake(touchPoint.x, touchPoint.y, imageViewBil1.frame.size.width, imageViewBil1.frame.size.height);

}