Hi I want to move a uibutton where even I want in my app like we have Assistive touch in iphone so as a same I want that kind of button in my app..Is it possible to do that If so please help out with code are some links for that
This question is asked so many times.... here is answer
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
button.frame.x = touchlocation.x;
button.frame.y = touchlocation.y;
}
Related
I feel strange, I have dark view(darkScreenView) and green view.
I using the
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchViewPoint = [touch locationInView:touch.view];
NSLog(#"[self.darkScreenView pointInside:touchViewPoint withEvent:event]:%d",[self.darkView pointInside:touchViewPoint withEvent:event]);
}
When I click on the dark view or green view,
The Log still show 1. why?
I click on the green view should show log 0, but I still get the log result 1.
I am using xcode 6.3.1.
Have anyone know what problem in this situation?
Thank you~
This will work
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchViewPoint = [touch locationInView:touch.view];
CGPoint pointOfDarkView = [touch.view convertPoint:touchViewPoint toView:self.darkview];
NSLog(#"[self.darkScreenView pointInside:touchViewPoint withEvent:event]:%d",[self.darkview pointInside:pointOfDarkView withEvent:event]);
Your problem:
touchViewPoint is relative to touch.view coordinate
You have to convert point to darkview coordinate first,then you can use pointInside:pointOfDarkView
Try to get touch for different views..
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
if (touch.view==GREEN_VIEW)
{
//Write your code for green view here
}
else if(touch.view==DARK_VIEW)
{
//Write your code for dark view here
}
}
Your touchViewPoint's location is relative to the touched view. So get location relative to self.darkView like below.
CGPoint touchViewPoint = [touch locationInView: self.darkView];
Here is the problem change to View you are referring to.
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchViewPoint = [touch locationInView:darkView]; <----- Problem
NSLog(#"[self.darkScreenView pointInside:touchViewPoint withEvent:event]:%d",[self.darkView pointInside:touchViewPoint withEvent:event]);
}
I’m intend to customize a UILabel and put it move with touch gestures, so I created a class named CustomLabel that inherits from UILabel and achieved the following two methods for handing touch events. But, the CustomLabel can’t move anyway ! However, when I change the father class of CustomLabel with UIView, UIbutton and etc. it’s works well. So anyone who can tell me the reason about this phenomen.
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *) event
{
if(!dragEnable)
{return;}
UITouch *touch = [touches anyObject];
beginPoint = [touch locationInView: self];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
if(!dragEnable)
{return;}
UITouch *touch = [touches anyObject];
CGPoint nowPoint = [touch locationInView:self];
float offsetX = nowPoint.x - beginPoint.x;
float offsetY = nowPoinr.y - beginPoint.y;
self.center = CGPointMake(self.center.x+offsetX, self.center+offsetY);
}
I apologize if any of my questions are so basic.
Any help or advice would be much appreciated.
I apologize for my questions are so basic, and I have found the solution. I forgot to set userInteractionEnabled to YES for the label object. I'm very sorry for this mistake.
hey guys i was wondering if there was away to make an object like a UIImageView draggable. I am aware of the UITouch and touches i.e.
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *drag=[[event allTouches] anyObject];
player.center=[drag locationInView:self.view];
}
but in this way it is possible for the user to make the object jump across the screen to where he or she touches the screen but i want the user to have to manually drag the object across the screen.
please explain with code and let me know if i have to be more specific or clear...
You can do this:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *aTouch = [touches anyObject];
CGPoint location = [aTouch locationInView:self.view];
if(CGRectContainsPoint(self.playerView.frame,location)) {
[UIView beginAnimations:#"Dragging A DraggableView" context:nil];
self.playerView.center = location;
[UIView commitAnimations];
}
}
This should give you a smooth animation.
if you want your user to drag&drop, first you have to check if the touch is inside the imageview rect frame. To improve the user experience, you can detect the touch offset from the imageview center; a good place to do this is inside the touchesBegan:withEvent:. After that, you have to change the position of the imageview, like this:
CGPoint touchOffset; //insert this inside your interface private iVars
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *drag=[[event allTouches] anyObject];
CGPoint touchLocation = [drag locationInView:self.view];
touchOffset = CGPointMake(player.center.x-touchLocation.x,player.center.y-touchLocation.y)
if(CGRectContainsPoint(player.frame,touchLocation)
player.center = CGPointMake(touchLocation.x+touchOffset.x,touchLocation.y+touchOffset.y);
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *drag=[[event allTouches] anyObject];
CGPoint touchLocation = [drag locationInView:self.view];
if(CGRectContainsPoint(player.frame,touchLocation)
player.center = CGPointMake(touchLocation.x+touchOffset.x,touchLocation.y+touchOffset.y);
}
P.S. - Next time try to search similar questions...
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch* aTouch = [touches anyObject];
UIView* aView = [aTouch view];
if (aView != self.view) {
[self.view bringSubviewToFront:aView];
}
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch* aTouch = [touches anyObject];
UIView* aView = [aTouch view];
if (aView != self.view) {
aView.center = [aTouch locationInView:self.view];
}
}
I created a very simple app that contains a draggable UIImageView but I faced a problem that the image can be dragged without touching it. I'm sure that the hole issue is from anyObject but I have no idea how to replace it I tried self.view.image but it failed. So here's my code
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
lineView.center = location;
}
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[self touchesBegan:touches withEvent:event];
}
any ideas?
Consider using a pan gesture recogniser. Add it only to the image view (and enable user interaction on the view). Now you will only get action method callbacks from the gesture when the view has actually been touched, your code becomes simpler, and you can move the view with that position.
Also, in your current code, it's weird to call touchesBegan: from touchesMoved:. If you keep that code (because you don't want to use a gesture), you should refactor the code that moves the view out into a different method and have both touchesBegan: and touchesMoved: call that method.
Try the following
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
if ([lineView pointInside:location withEvent:event])
lineView.center = location;
}
i create a UIButton *actionbtn,it's default image is 1.png,and hightlight image is 2.png, i select this button,and move it to any place of the screen.my code is
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint touchMoved = [touch locationInView:self];
actionbtn.frame = CGRectMake(touchMoved.x-40, touchMoved.y-40, 80, 80);
}
if i clicked the button and move it,it can not be moved,but if i touch the screen,and move on the screen the button can work...
Try this:
http://developer.apple.com/library/ios/#samplecode/MoveMe/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007315
It's an example with an UIButton that move on screen...
The button is moving when you keep touching the screen because you implemented -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;. If you attempted to move the button when simply touching the screen anywhere, place that code in -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;.
add an if clause in touchesMoved function.
UITouch *touch = [touches anyObject];
if( touch.view == button){
[button.center = [touch locationInView:self.view];
}