crash when using a category - ios

Question

I create a class category of UITouch this my code :
- (id)initInView:(UIView *)view;
{
CGRect frame = view.frame;
CGPoint centerPoint = CGPointMake(frame.size.width * 0.5f, frame.size.height * 0.5f);
return [self initAtPoint:centerPoint inView:view];
}
- (id)initAtPoint:(CGPoint)point inWindow:(UIWindow *)window;
{
self = [super init];
if (self == nil) {
return nil;
}
// Create a fake tap touch
_tapCount = 1;
_locationInWindow = point;
_previousLocationInWindow = _locationInWindow;
UIView *hitTestView = [window hitTest:_locationInWindow withEvent:nil];
_window = [window retain];
_view = [hitTestView retain];
if ([self respondsToSelector:#selector(setGestureView:)]) {
[self setGestureView:hitTestView];
}
_phase = UITouchPhaseBegan;
_touchFlags._firstTouchForView = 1;
_touchFlags._isTap = 1;
_timestamp = [[NSProcessInfo processInfo] systemUptime];
return self;
}
- (id)initAtPoint:(CGPoint)point inView:(UIView *)view;
{
return [self initAtPoint:[view.window convertPoint:point fromView:view] inWindow:view.window];
}
- (void)setPhase:(UITouchPhase)phase;
{
_phase = phase;
_timestamp = [[NSProcessInfo processInfo] systemUptime];
}
but when I call it I get this crash -[UITouch initAtPoint:inView:]: unrecognized selector sent to instance
How can I fix that?

Answer 1

You say you created a category, but did not include the definition of your category.
It should look something like this:
//UITouch+customInitMethods.h
#interface UITouch (customInitMethods)
- (id)initInView:(UIView *)view;
- (id)initAtPoint:(CGPoint)point inWindow:(UIWindow *)window;
- (id)initAtPoint:(CGPoint)point inView:(UIView *)view;
#end
And then your implementation:
#import "UITouch+customInitMethods.h"
#implementation UITouch (customInitMethod)
//Your method implementations go here.
#end
Make sure that the target checkbox on the .m file of your category file is set to include the category in your application target.
Then you would need to #import UITouch+customInitMethods.h in any file that wanted to use your custom init methods.