make some drag-able UIView - ios

Question

I'd like to make some drag-able UIView.
But in case of following code, you can drag only one UIView you have added at the last.
I have this code.
LabelView class is subclass of UIView.
ViewControlle.h
#interface ViewController : UIViewController
#property (nonatomic, strong) LabelView* labelView;
#end
ViewController.m
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
_labelView = [[LabelView alloc]initWithFrame:CGRectMake(100, 200, 200, 50)];
[self.view addSubview:_labelView];
UIPanGestureRecognizer* pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:#selector(panAction:)];
[_labelView addGestureRecognizer:pan];
UIButton* addButton = [[UIButton alloc]initWithFrame:CGRectMake(270, 60, 40, 40)];
[addButton addTarget:self action:#selector(newLabelView) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:addButton];
}
- (void)panAction:(UIPanGestureRecognizer *)sender
{
CGPoint p = [sender translationInView:self.view];
CGPoint movedPoint = CGPointMake(_labelView.center.x + p.x, _labelView.center.y + p.y);
_labelView.center = movedPoint;
[sender setTranslation:CGPointZero inView:self.view];
}
- (void)newLabelView
{
_labelView = [[LabelView alloc]initWithFrame:CGRectMake(20, 60, 200, 50)];
[self.view addSubview:_labelView];
UIPanGestureRecognizer* pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:#selector(panAction:)];
[_labelView addGestureRecognizer:pan];
}

Answer 1

You should apply the getsture for all the view. and then change the methods. _labelView.center = movedPoint; to [sender view].center = movedPoint;
- (void)panAction:(UIPanGestureRecognizer *)sender
{
CGPoint p = [sender translationInView:self.view];
CGPoint movedPoint = CGPointMake(_labelView.center.x + p.x, _labelView.center.y + p.y);
[sender view].center = movedPoint;
[sender setTranslation:CGPointZero inView:self.view];
}

Answer 2

You could create a mutable array, and then add each new view into that array. You do this by adding:
NSMutableArray *viewsArray = [[NSMutableArray alloc] init];
// after creating the custom view
[viewsArray addObject:customView];
Then, you can add a pan gesture on top of the views in the array, that way they are all using the pan gesture
for(LabelView *l in viewsArray) {
[l addGestureRecognizer:panGestureRecognizer];
}
this will add a UIPanGestureRecognizer to all the custom views in the array that you created in the beginning of this answer.
Hope this helps!