How to change the UILabel content by tapping?

How to change the UILabel content by tapping?

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How to change the UILabel content by tapping?
Tag : ios , By : Daljit Dhadwal
Date : November 24 2020, 05:47 AM

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How to change the alpha of a UILabel by tapping?

Tag : iphone , By : Anonymous
Date : March 29 2020, 07:55 AM
should help you out I have an iOS (4.0) app that I would like to change the alpha of a specific UILabel of just by taping anywhere on the screen. I don't have my interface done programmatically, I just used the interface builder to place the labels for things on the screen. , In viewDidLoad:
UITapGestureRecognizer *oneTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
    [oneTap setNumberOfTapsRequired:1];
    [oneTap setNumberOfTouchesRequired:1];
    [self.view oneTap];
-(void)tapAction:(UIGestureRecognizer *)gesture 
          [self.yourLabel setAlpha:0.5f]; // set the alpha to whatever you want, or animate the fade, whatever

iPhone:How to change rowheight by UILabel's content height

Tag : iphone , By : Heals1ic
Date : March 29 2020, 07:55 AM
To fix this issue I want to dynamicaly set the cell's rowheight to the UILabel's height (which is cell's subview). , (Mashup of my comments)

How to change content of UILabel inside of a closure

Tag : ios , By : Pepe Araya
Date : March 29 2020, 07:55 AM
seems to work fine You can change it by using dispatch_async on main thread. UI updates have to be done in the main thread. dataTaskWithURL executes in a background thread.
let task = session.dataTaskWithURL(url!) {(data, response, error) in

    if (error == nil)
          self.label.text = "Updated"

How to change UILabel height according to content in iOS

Tag : ios , By : hellboy32
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , There are some ways you could do that:
#1 caculate textSize then set to label:
- (CGSize)calculateSizeWithNSString:(NSString *)str {
  CGSize constraint1 = CGSizeMake(LABEL_WIDTH, FLT_MAX);
  UIFont *font = [UIFont systemFontOfSize:12];
  NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
  paragraph.lineBreakMode = NSLineBreakByWordWrapping;

  NSDictionary *attributesDictionary = [NSDictionary
      dictionaryWithObjectsAndKeys:font, NSFontAttributeName, paragraph,
                                   NSParagraphStyleAttributeName, nil];
  if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0f) {
  CGRect rect = [str boundingRectWithSize:constraint1
                             options:(NSStringDrawingUsesLineFragmentOrigin |
    constraint1 = rect.size;
  } else {
        //sizeWithFont:constrainedToSize:lineBreakMode: was deprecated from iOS7.0
        constraint1 = [str sizeWithFont:font
      return constraint1;
- (void)changeLabelSize:(UILabel *)label {
  CGRect labelFrame = label.frame;
  CGSize constraint1 = CGSizeMake(LABEL_WIDTH, FLT_MAX);
  CGSize expectSize = [label sizeThatFits:constraint1];
  labelFrame.size = expectSize;
  label.frame = labelFrame;
 // remove this line you dont need it any more
 CGSize size1 = [text1 sizeWithFont:[UIFont systemFontOfSize:12] constrainedToSize:constraint1 lineBreakMode:NSLineBreakByWordWrapping];
[lblComment setFont:[UIFont systemFontOfSize:10]];
    lblComment.text = text1;
[self changeLabelSize:lblComment];
CGSize size1 = lblComment.frame.size; //for your calculate x_pos, y_pos code
[bgView addSubview:lblComment];
    float col1_y_pos = 5;
    float col2_y_pos = 5;
    for (int i = 0; i < contentArr.count; i ++)
        BOOL isColumn1 = (i%2 == 0)
        float x_pos = isColumn1 ? 5 : column2_x_pos_value;
        float y_pos = isColumn1 ? col1_y_pos: col2_y_pos;
        //your code set label frame with x_pos, y_pos
        CGSize size1 = lblComment.frame.size; 
        [bgView addSubview:lblComment];
        if (isColumn1) { 
           col1_y_pos += size1.height + marginTop;
        } else {
          col2_y_pos += size1.height + marginTop;

How do I show a UIPickerView when tapping a UILabel (Swift)?

Tag : ios , By : user185283
Date : March 29 2020, 07:55 AM
hop of those help? My app displays the price of something when it boots and I have the list of currencies hidden. When the user taps the price, I want to it reveal the list of currencies hidden below and then hide them again after one is selected. Can't figure out how though, not finding any Swift code for a tap gesture recogniser? I'm you could just do something like priceLabel.isTappedUp = blah blah, years ago, maybe it was Objec C. Any ideas? , You can try gesture
    let tapRound = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))

    priceLabel.isUserInteractionEnabled = true

@objc func handleTap(_ sender: UITapGestureRecognizer? = nil)
    self.currencyPicker.isHidden = false

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