Question

Manually built:

[btnRun addTarget:self action:@selector(RunApp:) forControlEvents:UIControlEventTouchUpOutside];

---

Programmatically built: something of the following like ??

- (void) setRunButton:(UIButton*)objectName mySelector:(NSString*)funcName myControlEvent:(NSString*) controlEvent
{
    [objectName addTarget:self action:@selector(funcName) forControlEvents:controlEvent];
}

Answer 1

I think you’d need something like the following:

- (void)setRunButton:(UIButton *)objectName mySelector:(NSString *)action myControlEvent:(UIControlEvents)controlEvent {

   [objectName addTarget:self action:NSSelectorFromString(action) forControlEvents:controlEvent];

}

It is unusual to pass a selector as an NSString but you can use NSSelectorFromString() to convert the string name of the selector into a selector.

Control events parameters are not strings they are an enumeration so I have changed the myControlEvent parameter to have the UIControlEvents type.

It would be more usual to pass the selector to the method using @selector(action). However, @selector is handled at compile time so the parameter isn’t actually an NSString. In this case the method would look like:

- (void)setRunButton:(UIButton *)objectName mySelector:(SEL)action myControlEvent:(UIControlEvents)controlEvent {

   [objectName addTarget:self action:action forControlEvents:controlEvent];

}