UIButton target not recognized when adding button superview controller to another viewController

0
votes

I created a sub-class of UIViewController called toolbarViewController , I declare a UIButton in this view controller and specified it's target as following

UIButton *button = [[UIButton alloc]initWithFrame:myFrame];
[button addTarget:self action:@selector(doSomething) forContorlEvents:UIControlEventTouchUpInside];

then i do the following in a different view controller

toolbarViewController *toolbar = [[toolbarViewController alloc]init];
[self.view addSubview:toolbar.view];

the problem is that when i press the button i get the exception: Unrecognized selector ( doSomething ) send to instance , what am i doing wrong here ?

doSomething declaration in toolbarViewController.h

-(void)doSomething;

and in toolbarViewController.m

-(void)doSomething{ NSLog("doSomething got called"); }
3
iphoneobjective-ciosuiviewcontrolleruibutton
Did you implement the doSomething method? If yes, in which class? - Ilanchezhian
Is your doSomething accept parameter?Can you please show your doSomething definition? - Nuzhat Zari
of course i implemented doSomething, i did that in the toolbarViewController class - ahmad
your addTarget:self need to be the the class obj where you have doSomething method e.g addTarge:yourCalassObj - Warif Akhand Rishi

3 Answers

1
votes

Check the declaration of doSomething. If you declare IBAction something like -(IBAction)doSomething:(id)sender, you should add selector like 

[button addTarget:self action:@selector(doSomething:) forContorlEvents:UIControlEventTouchUpInside];

instead of 

[button addTarget:self action:@selector(doSomething) forContorlEvents:UIControlEventTouchUpInside];
1
votes

if you use ARC，you alloc toolbarViewController，but it has relese。you can try to this:

ViewController.h
@interface ViewController : UIViewController{
    toolbarViewController * toolbar;
}
@property(nonatomic,strong) toolbarViewController * toolbar;


ViewController.m
@synthesize toolbar = _toolbar;


    toolbar = [[toolbarViewController alloc]initWithNibName:@"toolbarViewController" bundle:[NSBundle mainBundle]];

and you alloc button can do this:

UIButton *bt = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        bt.frame = myFrame;
        [bt addTarget:self action:@selector(dosomething) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:bt];
0
votes

One possible case is if you add a UITapGestureRecognizer to the UIButton's superview. On iOS5 it seems there is an issue with UITapGestureRecognizers that do not cancel the tap in view.

So all you need to do is set the

tapGesture.cancelsTouchesInView = NO;

let me know if it helped!