Question

I have a function (for example function1)where I have a button and an object called auxiliarStruct, and I have that line:

[btn addTarget:self action:@selector(userSelected:) forControlEvents:UIControlEventTouchUpInside];

But in @selector(userSelected) I need to pass as parameters an object needed in that function, but I don’t know how implement it.
I have declared that object here:

//UsersController.h
#import <UIKit/UIKit.h>

@interface UsersController : NSObject{
    NSInteger *prof_id;
    NSString *createTime;
    NSString *fullName;
    NSString *thumb;
}

@property (nonatomic) NSInteger *prof_id;
@property (nonatomic, retain) IBOutlet NSString *createTime;
@property (nonatomic, retain) IBOutlet NSString *fullName;
@property (nonatomic, retain) IBOutlet NSString *thumb;

@end

I have the called function declared like this:

-(void)userSelected:(id)sender{
  //CODE
}

I have an object of this class, called auxiliarStruct and this is that I need. I tried with

[btn addTarget:self action:@selector(**userSelected:auxiliarStruct**)forControlEvents:UIControlEventTouchUpInside];

but it don’t works
Can anyone help me? Thanks.

ps: sorry for my english, i know it’s bad

Answer 1

You can only Pass a (UIButton*) object as a parameter with addTarget @selector method. You can set the UIButton tag and use it on the called function. You may want to find out any alternatives for sending string values.

Use the below code for passing a tag with button :

     btn_.tag = 10; 
    [btn_ addTarget:self action:@selector(functionName:) forControlEvents:UIControlEventTouchUpInside];

The button action should look like this :

- (void) functionName:(UIButton *) sender {

    NSLog(@"Tag : %d", sender.tag);

}