Callbacks

~ me

There are many different callbacks method signatures in iOS. Most of the time programmers may not recall all of them when they come to use.

Here I provide a check list of different call backs. Will add incrementally.

<GestureRecognizer>

UITapGestureRecognizer* gest_0 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap_view)];
[control_0 addGestureRecognizer:gest_0];
- (void)tap_view:(UITapGestureRecognizer*)recognizer{
   UIButton* btn_sender = (UIButton*)[recognizer view];
}

<NSTimer>

[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timer_callback:) userInfo:button repeats:FALSE];

-(void) timer_callback:(id)user_info{
   UIButton* btn_0 = (UIButton*)user_info;
}

<Multi-Threading>

[NSThread detachNewThreadSelector:@selector(threaded_function:) toTarget:self withObject:button];

-(void) threaded_function:(id) param{
   UIButton* btn_0 = (UIButton*)user_info;
}