uitouch

问题 I was just wondering how can this happen. In my iPhone application during a http request loading I am disabling a button in the navigation bar. But when I touch the button three or four times the action method gets called after the loading is completed this means that even though the button is disabled the touches are detected on it and later the ibaction method is called . So is this exceptional or is there any way to prevent this ? Thanks .... 回答1: Setting a UIControl disabled does not

问题 I was just wondering how can this happen. In my iPhone application during a http request loading I am disabling a button in the navigation bar. But when I touch the button three or four times the action method gets called after the loading is completed this means that even though the button is disabled the touches are detected on it and later the ibaction method is called . So is this exceptional or is there any way to prevent this ? Thanks .... 回答1: Setting a UIControl disabled does not

问题 There is a hero that is controlled by tapping on the screen. I want the hero too look a little different every time the screen gets touched. What I did is setting up two images that are a little different. I want the image of the hero to be changed when there is a touch event. Until now I set up an array to save the information in but it kinda won't work out: NSMutableArray *heroFrames = [NSMutableArray array]; NSString* textureName = nil; if (UITouchPhaseBegan) { textureName = @"hero1.gif";

问题 i wonder if you guys have a sample code adding and move UIImageView on touch and also detect if there is an UIImageView there so i can't add UIImageView on top of it. EDIT: clearer question 1. i wanna add an cups(UIImageView) when i touch the view but do not wan the cup(UIImageView) to stack. i wanna move the UIImageView but will bounce back to the original position if there is an UIImageView there so it will not stack the UIImageView already there. thanks for reading my question and

问题 I have a series of UIViews inside a UIScrollView, and the UIViewControllers for those views are not receiving the touch events. If I take the views out of the scroll view then it works. I have enabled userInteraction on the views but it's still not working! This must be possible and I'd be really grateful if someone could point me in the right direction! Thanks, Mike 回答1: Do the views have their own touch handlers, or are you relying on the viewcontroller to get the touches? Depending on how

问题 Hey I know there are already a few posts about this - yet I still can't find an adequate answer for the problem I'm having. Just new to cocoa and iOS, I'm in the middle of developing my first iOS game. In this game I would like to be able to calculate the speed of a user's swipe. I'm having no difficulty finding the distance between successive touches in the swipe motion, but am having difficulty determining the time elapsed between the touches in touchesMoved: I do calculations with the

问题 I am new to iOS, I am using UIPanGestureRecognizer in my project. In which I have a requirement to get current touch point and previous touch point when I am dragging the view. I am struggling to get these two points. If I use touchesBegan method Instead of using UIPanGestureRecognizer , I could get these two points by the following code: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ CGPoint touchPoint = [[touches anyObject] locationInView:self]; CGPoint previous=[[touches

问题 I have the following code for testing purposes: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self customTouchHandler:touches]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [self customTouchHandler:touches]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [self customTouchHandler:touches]; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { [self customTouchHandler:touches]; } - (void)customTouchHandler:

问题 I have 2 functions to resignFirstResponder but neither of them works when the textfields are in scrollview my functions: -(BOOL)textFieldShouldReturn:(UITextField *)theTextField { if (theTextField == textField1) { [textField1 resignFirstResponder]; } if (theTextField == textField2) { [textField2 resignFirstResponder]; } if (theTextField == textField3) { [textField3 resignFirstResponder]; } return YES; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [

问题 I want to create a UIButton that can be held down, when held down it calls the "hold down" action once. when it is released, calls the "hold was release" action. This code isn't working correctly because the touch can move inside the button and the events aren't triggered in correct order [button handleControlEvent:UIControlEventTouchDown withBlock:^{ [self performMomentaryAction:PXActionTypeTouchDown]; }]; [button handleControlEvent:UIControlEventTouchUpInside withBlock:^{ [self