Question

I want to create uibuttons dynamically. so i for loop to create button with tag and added to view.
all buttons performs the same action with respect to its tag value… but i want to change the propery of the button. Therefore i need to get the uibutton using the tag value…

my code…

UIButton *button2;
//view did load
int width = 30;

for(int i = 1; i <= 5; i++)
{
    button2 = [UIButton buttonWithType:UIButtonTypeCustom];
    [button2 addTarget:self action:@selector(ratingAction:) forControlEvents:UIControlEventTouchUpInside];
    [button2 setBackgroundImage:[UIImage imageNamed:@"star1.png"] forState:UIControlStateNormal];
    button2.tag = i;
    button2.backgroundColor = [UIColor clearColor];
    button2.frame = CGRectMake(width, 78, 15, 15);

    [self.view addSubview:button2];

    width = width +30;
}

-(void)ratingAction:(id*)sender
{
    // here using the tag value i want to get the button and change the background image….
    // for example i want to change the background for tag values 1,3,6,7 ,8…
}

Answer 1

Use viewWithTag function of UIView to access your UIButton using the tag value.

See in Documentation viewWithTag

Use it as below.

UIButton* myButton = (UIButton*)[mySuperView viewWithTag:1];
UIButton* myButton = (UIButton*)[mySuperView viewWithTag:3];
UIButton* myButton = (UIButton*)[mySuperView viewWithTag:6];
.........