Touch Events
Post: #1
Hello, just wondering if there are certain variables or functions that return if the user has swiped his/her finger on the iPhone's screen. I read in the UITouch Reference:
I'm just looking for a specific function that will tell me if this has happened. If there isn't one, then is it all done manually? Thanks
Al
Quote:whether the finger is swiped (and if so, in which direction)
I'm just looking for a specific function that will tell me if this has happened. If there isn't one, then is it all done manually? Thanks
Al
Post: #2
You've got to handle swipes and pinches and what not yourself. The system only provides began/ended/cancelled/moved.
Post: #4
I'll see if this gets an answer on this thread beforee posting my own!
I'm trying to get multi-touch working. So far I have this...
Which works perfectly well, I can sure enough point and do stuff. When I touch my finger on the screen, I get the debug 'Touch Began' as expected. However, if I keep that finger down, then put another one down, then I dont see the debug again.
This leads me to believe that this function is only beign called once, when I would expect it to be called every time I put a new finger on the screen.
Or am I barking up totally the wrong tree with regards to multi touch?
I'm trying to get multi-touch working. So far I have this...
Code:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint Point = [touch locationInView:self];
printf("Touch Began\n");
/*
Do stuff with point.x and point.y
*/
}Which works perfectly well, I can sure enough point and do stuff. When I touch my finger on the screen, I get the debug 'Touch Began' as expected. However, if I keep that finger down, then put another one down, then I dont see the debug again.
This leads me to believe that this function is only beign called once, when I would expect it to be called every time I put a new finger on the screen.
Or am I barking up totally the wrong tree with regards to multi touch?
Post: #5
By default, UIResponder subclasses (that is, anything that can respond to touchesBegan:withEvent: and company) have multi-touch disabled. You have to explicitly tell it that it can accept multitouch events. You can do this in a XIB file or in code.
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