In my application i have added a google maps on my view.
I want to know the touch point on the mapView / myView, where did i taped
So that i implemented logic as follows.
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint touchPoint = [[touches anyObject] locationInView:mapView_];
CGPoint touchPoint2 = [[touches anyObject] locationInView:self.view];
NSLog(#"========== %#", NSStringFromCGPoint(touchPoint));
NSLog(#"========== %#", NSStringFromCGPoint(touchPoint2));
//UITouch *touch = [[event allTouches] anyObject];
//CGPoint touchPoint = [touch locationInView:touch.view];
}
But it works only for the first touch, from the next touch event this method doesn't calls.
I didn't get what was the problem is
You can't get the touch loctaion on a map,when we touch it ,it becomes zoom,the touch events is on the UIView
with the help of this i get a log at everytime i touch on mapview with exact touch points
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint touchPoint = [[touches anyObject] locationInView:self.viewMap];
NSLog(#"==========1 %#", NSStringFromCGPoint(touchPoint));
}
I want to drag image from carousel of image and put it in another imageview.After drag of it should delete from carousel.I have done code for this that will also remove from carousel.
I used touch events.
But problem is that after draging one image when i touch anywhere else in the screen it will select next image automatically.How can i stop it?I want to drag image when i click on it.
My Code.
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
btnBackImg.center = location;
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint pointMoved = [touch locationInView:self.view];
btnBackImg.frame = CGRectMake(pointMoved.x, pointMoved.y, btnBackImg.frame.size.width,btnBackImg.frame.size.height);
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
NSLog(#"touch end");
if (btnBackImg != nil)
{
UITouch *touch = [[event allTouches] anyObject];
if (CGRectContainsPoint(basket_image.frame, [touch locationInView:self.view]))
{
basket_image.image=[UIImage imageNamed:[NSString stringWithFormat:#"wit_bas.png"]];
[self.product_categories removeObjectAtIndex:imgIndex+1];
[carousel reloadData];
}
}
}
In this btnCackImg want to move in to basketImg.
If anyone konw then pls help me or if any link then also useful.
Thanks in Advance.
You have used this code in your touches.began CGPoint location = [touch locationInView:touch.view]; where touch.View means touching all the objects in the view namely self.view. What you really need is to add the name of the image to be put instead of touch.View. This will select the image at one time.
CGPoint location = [touch locationInView:imageName];
I am creating an app in which when user click on any object and when user tap on UIView, then that images should drop on the view, and on dragging that image in any direction it should be re-sized.
Anyone having any idea to do this, please let me know.
or Can I get any sample code for this?
Thanks
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
if ([touch view] == photo) {
photo.center = touchLocation;
}
else if ([touch view] == photo1) {
photo1.center = touchLocation;
}
}
or you can see in that link http://www.roseindia.net/tutorial/iphone/examples/iphone-DoubleImageMoveasd.html
Is it possible to drag UIView around the iOS screen while it has both image and text? e.g. small cards. Could you point me to the similar (solved) topic? I haven't found any.
This is what a neat solution, based on pepouze's answer, would look like (tested, it works!)
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *aTouch = [touches anyObject];
CGPoint location = [aTouch locationInView:self];
CGPoint previousLocation = [aTouch previousLocationInView:self];
self.frame = CGRectOffset(self.frame, (location.x - previousLocation.x), (location.y - previousLocation.y));
}
While UIView does not have a built-in support for moving itself along the user dragging, it should be not so difficult to implement it. It is even easier when you are only dealing with dragging on the view, and not other actions such as tapping, double tapping, multi-touches etc.
First thing to do is to make a custom view, say DraggableView, by subclassing UIView. Then override UIView's touchesMoved:withEvent: method, and you can get a current dragging location there, and move the DraggableView. Look at the following example.
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *aTouch = [touches anyObject];
CGPoint location = [aTouch locationInView:self.superview];
[UIView beginAnimations:#"Dragging A DraggableView" context:nil];
self.frame = CGRectMake(location.x, location.y,
self.frame.size.width, self.frame.size.height);
[UIView commitAnimations];
}
And because all subviews of the DraggableView object will be moved, too. So put all your images and texts as subviews of the DraggableView object.
What I implemented here is very simple. However, if you want more complex behaviors for the dragging, (for example, the user have to tap on the view for a few seconds to move the view), then you will have to override other event handling methods (touchesBegan:withEvent: and touchesEnd:withEvent) as well.
An addition to MHC's answer.
If you don't want the upper left corner of the view
to jump under your finger, you can also override touchesBegan
like this:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *aTouch = [touches anyObject];
offset = [aTouch locationInView: self];
}
and change MHC's touchesMoved to:
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *aTouch = [touches anyObject];
CGPoint location = [aTouch locationInView:self.superview];
[UIView beginAnimations:#"Dragging A DraggableView" context:nil];
self.frame = CGRectMake(location.x-offset.x, location.y-offset.y,
self.frame.size.width, self.frame.size.height);
[UIView commitAnimations];
}
you should also define CGPoint offset in the interface:
#interface DraggableView : UIView
{
CGPoint offset;
}
EDIT:
Arie Litovsky provides more elegant solution that allows you to ditch the ivar: https://stackoverflow.com/a/10378382/653513
Even though rokjarc solution works, using
CGPoint previousLocation = [aTouch previousLocationInView:self.superview];
avoids the CGPoint offset creation and the call to touchesBegan:withEvent:
Here is a solution to drag a custom UIView (it can be scaled or rotated through its transform), which can hold images and/or text (just edit the Tile.xib as required):
- (void) touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event
{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:self];
CGPoint previous = [touch previousLocationInView:self];
if (!CGAffineTransformIsIdentity(self.transform)) {
location = CGPointApplyAffineTransform(location, self.transform);
previous = CGPointApplyAffineTransform(previous, self.transform);
}
self.frame = CGRectOffset(self.frame,
(location.x - previous.x),
(location.y - previous.y));
}
This work for me. My UIView rotated and scaled
- (void) touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:self];
CGPoint previous = [touch previousLocationInView:self];
if (!CGAffineTransformIsIdentity(self.transform)) {
location = CGPointApplyAffineTransform(location, self.transform);
previous = CGPointApplyAffineTransform(previous, self.transform);
}
CGRect newFrame = CGRectOffset(self.frame,
(location.x - previous.x),
(location.y - previous.y));
float x = CGRectGetMidX(newFrame);
float y = CGRectGetMidY(newFrame);
self.center = CGPointMake(x, y);
}
Which is the best way to move a UIView.
I have a custom UIView with some custom things in it, like shadows, labels etc.
Today I'm using, for move this UIView.:
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
if (self.isEditing) {
CGPoint location = [touch locationInView:[rootView view]];
self.center = location;
}
}
Is this the best way to move a UIView? I experience this a bit laggy.
I usually reposition a view using the offset between the touchesBegan location and the touchesMoves location.