Odd values/movement with UITouch and CGPoint.
- by Joshua
I'm getting odd numbers from UITouch and CGPoint and one is different, I also think this maybe causing a flickering affect in my app when I try to move something by following a touch.
This is the code I'm using:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
NSLog(@"touchDown");
UITouch *touch = [touches anyObject];
firstTouch = [touch locationInView:self.view];
if (CGRectContainsPoint(but.frame, firstTouch)) {
butContains = YES;
NSLog(@"butContains = %d", butContains);
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
currentTouch = [touch locationInView:self.view];
NSInteger x = currentTouch.x;
NSInteger y = currentTouch.y;
CGFloat CGX = (CGFloat)x;
CGFloat CGY = (CGFloat)y;
if (butContains == YES) {
NSLog(@"touch in subView/contentView");
sub.frame = CGRectMake(CGX, CGY, 130.0, 21.0);
}
NSLog(@"touch moved");
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
currentTouch = [touch locationInView:self.view];
NSLog(@"User tapped at %@", NSStringFromCGPoint(currentTouch));
NSLog(@"Point %a, %a", currentTouch.x, currentTouch.y);
NSInteger x = currentTouch.x;
NSInteger y = currentTouch.y;
NSLog(@"Point %a, %a", y, x);
CGFloat CGX = (CGFloat)x;
CGFloat CGY = (CGFloat)y;
NSLog(@"Point %g, %g", CGX, CGY);
if (butContains == YES) {
NSLog(@"touch in subView/contentView");
sub.frame = CGRectMake(CGX, CGY, 130.0, 21.0);
}
butContains = NO;
NSLog(@"touch ended");
}
- (IBAction)add:(id)sender{
InSightViewController *contentView = [[InSightViewController alloc] initWithNibName:@"SubView" bundle:[NSBundle mainBundle]];
[contentView loadView];
[self.view insertSubview:contentView.view atIndex:0];
}
This is what I get from the touchesEnded method in the Debugger.
2010-04-20 20:06:13.045 InSight[25042:207] User tapped at {50, 78}
2010-04-20 20:06:13.047 InSight[25042:207] Point 0x1.9p+5, 0x1.38p+6
2010-04-20 20:06:13.048 InSight[25042:207] Point 0x1.900000027p-1037, 0x1.38p+6
2010-04-20 20:06:13.048 InSight[25042:207] Point 50, 78
And this is what's happening in the Simulator. fwdr.org/file:y8bd
As this is a complicated problem this is the source code of my XCode Project aswell. http://cl.ly/Qjj
