This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to detect Swipe Gesture in iPhone SDK?
How can I detect a swipe gesture within the interface of my iPhone application?
Create a UIView.
Create a a subclass of a UIGestureRecognizer (sounds like you'd like to use UISwipeGestureRecognizer).
Use the UIView instance method
addGestureRecognizer: to attach your UIGestureRecognizer to the UIView instance.
Seriously though... you should be reading documentation and books, or watching the Apple development videos as opposed to posting on here...
Check out the UIGestureRecognizer Class Reference. Being new to the iOS SDK, Apple Developer Documents will be one of your best friends, 2nd to Google anyway.
Related
Implement UITouches Gesture grammatically:
I want to implement touches gesture by xcode itself,
I looked iOS create touch event programmatically
but there is no answer.
If I am searching any wrong thing please let me know.
It's not easy to synthesize a touch event on the iPhone: you have to use undisclosed API, so you have a high probability of breaking on every update of the iOS and getting rejecting from Apple.
Here's a link that demonstrates how to synthesize a touch event on the iPhone:
Here's another question on StackOverflow: How to send a touch event to iPhone OS?
This question already has answers here:
How to add sound while UIScrollview is scrolling in iphone sdk?
(2 answers)
Closed 3 years ago.
how to add sounds in uiscrollview,while swiping different images with different sounds.
please help me.
Thanks regards
Rajan
When scrolling stop then you can check that page is changed or not. If Changed than play sound else not.
You have to use UIScrollViewDelegate methods to achieve this task you can use
scrollViewDidEndDecelerating: to achieve this with the using one ivar to store the current display position of the UIScrollView and in this method using contentOffset.x property of the UIScrollView you can achieve what you need.
Yep you need to use AVAudioPlayer to play sound.
Think this will help you.
Happy Codding :)
Enjoy Coding :)
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Tasks with my UIImageView
How can i highlight my UIImageview and display a deleteButton(cross button) on top of the imageview when user touching the UIImageview?.
You need to create a IBAction that adds the cross button and wire it to the touchDown event in interface builder. You could probably make a timer that will give it a couple seconds before activating.
Option 2: read about gestureRecognizers, they are very simple and I learned them in a couple hours.
http://developer.apple.com/library/ios/#documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/GestureRecognizers/GestureRecognizers.html <-- all about recogizers
It's pretty straight forward. Use
UILongPressGestureRecognizer
In the methods below write a code for detecting gestures and popping up a delete button.
- (void)handleGesture; //or
- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer;
For deleting use
- (void)removeTarget:(id)target action:(SEL)action
If the user writes "t" on the particular touch area, the iPhone should recognise it and it should be displayed.
Where should the user write? Is there any specific area like UItextfield and how is it recoginised (letter written by the user)?
Apparently there is something that's called UITextField and you can access it's properties. But you should (TOTALLY) read through the developer.apple.com stuff first. There are also some nice videos on youtube and on apple that will help you get an entry.
Please! don't be lazy and learn about the basics! If you have any further questions about usage or something else: Use the Forum Search! Google it! Then ask your question!
You can subclass the UIVIew and create an new custom View.
Define the following methods:
touchesBegan:withEvent:
touchesMoved:withEvent:
touchesEnded:withEvent:
touchesCancelled:withEvent:
Each time user starts touching and ends the touch record the set of of points user has traveled and use these stored values in drawRect Method to draw lines between them.
Implement drawRect: method in your custom view and do the drawing of lines according to the users touch points.
You can also consider creating a gesture recognizer for this. This is the basic guide that can get you started.
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UIControlEventTouchDragExit triggers when 100 pixels away from UIButton
(3 answers)
Closed 6 years ago.
Im trying to "get" when a finger/touch leaves a UIButton in objective C for iphone.
I was told in another answer to use UIControlEventTouchDragExit however this event only fires when the touch gets about 100 pixels away from the button, whereas I would like it to be immediate. The apple docs say that goes according to the bounds however my understand is the bounds and the frame are the same unless you rotate the UIbutton (or whatever)
The extra area is a built-in feature, to account for the inexactness of using a finger to interact with the interface. If you want to get around this, you have to subclass UIControl and override -(BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)eventand related methods to get the behavior your want.