How to get a certain subview from UIView by tag

Question

I'm a noob in Objective-C and I have one question.

I have one UILabel object that I adding to one UIView with this code:

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,10,self.view.frame.size.width-15-70, 30)];
label.tag = 1;
label.font = [PublicObject fontTexts:17];
label.textAlignment = NSTextAlignmentRight;
label.textColor = [UIColor whiteColor];
[cell setBackgroundColor:[UIColor clearColor]];

 UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
 view.backgroundColor = [PublicObject colorWithHexString:@"cd4110"];
 label.text = [filterData objectAtIndex:indexPath.row];
 view addSubview:label];

Now I want get one subview in my view where this subview has tag = 1 and save it on another object like this:

UILabel *tagLabel;
tagLabel = // I want get one subview in view where tag = 1 

Please help me understand how to do this.

Solution 1

You can get your subviews with for loop iteration

for (UIView *i in self.view.subviews){
      if([i isKindOfClass:[UILabel class]]){
            UILabel *newLbl = (UILabel *)i;
            if(newLbl.tag == 1){
                /// Write your code
            }
      }
}

Swift

let label:UILabel = self.view.viewWithTag(1) as! UILabel

Solution 2

Example with UILabel:

UILabel *label = (UILabel *)[self.view viewWithTag:1];

good luck!

Solution 3

You can get the subview with the code which others have mentioned, just like

UILabel *tagLabel = (UILabel*)[view viewWithTag:1];

But an important point to remember,

• Make sure the parent view doesn't have the same tag value as of the subview. Otherwise the viewWithTag: method will return the receiver view (on which you are calling viewWithTag:) instead of returning the actual subview you want.

So keep the parent view and child views tags distinct whenever you need to use viewWithTag:.

Solution 4

Swift 3, Swift 4 and Swift 5

if let subLabel: UILabel = primaryView.viewWithTag(123) as? UILabel {
    subLabel.text = "do things here :-D"
}

Solution 5

You could use the viewWithTag: method.

View more solutions

Comments

[user3797431]

my friend I want get UILabel with tag!!! if were many label in my view I can't use this ... please guide me with tag for any label

[Hiren]

Set the unique tag values to all views and access the object using tag.

[AhabLives]

MAKE SURE YOUR PARENT VIEW DOES NOT HAVE THE SAME TAG AS YOUR PARENT VIEW !!! I was on the verge of losing my mind. Thank You. Your comment saved my life.

[saraman]

Fastest code is not taht but it is that: UILabel tagLabel = (UILabel)[view viewWithTag:1];

[Baxissimo]

[view viewWithTag:x] also searches hierarchically, not just the immediate children. If you want to avoid searching subviews of subviews this might be a good answer, but that's kind of a niche use case. Or if you want to avoid finding matching tags that aren't UILabel at all cost, then this manual approach might also be called for.

[Christian Ayscue]

Use [UIView viewWithTag:]