Programmatically scroll UIScrollView so UILabel is just below navigation bar











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I have a UIScrollView that contains various blocks of buttons, textfields and labels.



There is a UILabel heading the second block. When I tap a button beside it, I wish to programmatically scroll so this label is at the top left of the screen, just below the navigation bar.



I can use the setContentOffset function to do this programmatically, but I can't work out how to programmatically get the value for y. As the top block can expand or contract based on user input I need to get this value programmatically. How do I get the correct value of y for my label?



let myLabelTopYPoint = ??!


I played around with the following two lines but neither gave what I wanted...



let myLabelTopYPoint = myLabel.convert(myLabel.center, to: self.view).y

let myLabelTopYPoint = myLabel.frame.maxY


(Applying the below with a manually chosen y of 200 works in the meantime for most user inputs, but is not satisfactory)



myScrollView.setContentOffset(CGPoint(x: 0, y: myLabelTopYPoint), animated: true)









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    up vote
    1
    down vote

    favorite












    I have a UIScrollView that contains various blocks of buttons, textfields and labels.



    There is a UILabel heading the second block. When I tap a button beside it, I wish to programmatically scroll so this label is at the top left of the screen, just below the navigation bar.



    I can use the setContentOffset function to do this programmatically, but I can't work out how to programmatically get the value for y. As the top block can expand or contract based on user input I need to get this value programmatically. How do I get the correct value of y for my label?



    let myLabelTopYPoint = ??!


    I played around with the following two lines but neither gave what I wanted...



    let myLabelTopYPoint = myLabel.convert(myLabel.center, to: self.view).y

    let myLabelTopYPoint = myLabel.frame.maxY


    (Applying the below with a manually chosen y of 200 works in the meantime for most user inputs, but is not satisfactory)



    myScrollView.setContentOffset(CGPoint(x: 0, y: myLabelTopYPoint), animated: true)









    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have a UIScrollView that contains various blocks of buttons, textfields and labels.



      There is a UILabel heading the second block. When I tap a button beside it, I wish to programmatically scroll so this label is at the top left of the screen, just below the navigation bar.



      I can use the setContentOffset function to do this programmatically, but I can't work out how to programmatically get the value for y. As the top block can expand or contract based on user input I need to get this value programmatically. How do I get the correct value of y for my label?



      let myLabelTopYPoint = ??!


      I played around with the following two lines but neither gave what I wanted...



      let myLabelTopYPoint = myLabel.convert(myLabel.center, to: self.view).y

      let myLabelTopYPoint = myLabel.frame.maxY


      (Applying the below with a manually chosen y of 200 works in the meantime for most user inputs, but is not satisfactory)



      myScrollView.setContentOffset(CGPoint(x: 0, y: myLabelTopYPoint), animated: true)









      share|improve this question













      I have a UIScrollView that contains various blocks of buttons, textfields and labels.



      There is a UILabel heading the second block. When I tap a button beside it, I wish to programmatically scroll so this label is at the top left of the screen, just below the navigation bar.



      I can use the setContentOffset function to do this programmatically, but I can't work out how to programmatically get the value for y. As the top block can expand or contract based on user input I need to get this value programmatically. How do I get the correct value of y for my label?



      let myLabelTopYPoint = ??!


      I played around with the following two lines but neither gave what I wanted...



      let myLabelTopYPoint = myLabel.convert(myLabel.center, to: self.view).y

      let myLabelTopYPoint = myLabel.frame.maxY


      (Applying the below with a manually chosen y of 200 works in the meantime for most user inputs, but is not satisfactory)



      myScrollView.setContentOffset(CGPoint(x: 0, y: myLabelTopYPoint), animated: true)






      ios swift






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      asked Nov 11 at 7:53









      Daniel

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      305
























          1 Answer
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          up vote
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          down vote



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          You can get y position of your label in scroll view like this:



          let myLabelTopYPoint = yourScrollView.convert(myLabel.frame, to: yourScrollView).minY





          share|improve this answer























          • Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
            – Daniel
            Nov 11 at 8:17










          • Try edited answer
            – Robert Dresler
            Nov 11 at 8:32










          • Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
            – Daniel
            Nov 11 at 8:49










          • Didn't you forget to use yourScrollView.convert instead of view.convert?
            – Robert Dresler
            Nov 11 at 8:50










          • Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
            – kelin
            Nov 11 at 8:56











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          1
          down vote



          accepted










          You can get y position of your label in scroll view like this:



          let myLabelTopYPoint = yourScrollView.convert(myLabel.frame, to: yourScrollView).minY





          share|improve this answer























          • Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
            – Daniel
            Nov 11 at 8:17










          • Try edited answer
            – Robert Dresler
            Nov 11 at 8:32










          • Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
            – Daniel
            Nov 11 at 8:49










          • Didn't you forget to use yourScrollView.convert instead of view.convert?
            – Robert Dresler
            Nov 11 at 8:50










          • Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
            – kelin
            Nov 11 at 8:56















          up vote
          1
          down vote



          accepted










          You can get y position of your label in scroll view like this:



          let myLabelTopYPoint = yourScrollView.convert(myLabel.frame, to: yourScrollView).minY





          share|improve this answer























          • Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
            – Daniel
            Nov 11 at 8:17










          • Try edited answer
            – Robert Dresler
            Nov 11 at 8:32










          • Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
            – Daniel
            Nov 11 at 8:49










          • Didn't you forget to use yourScrollView.convert instead of view.convert?
            – Robert Dresler
            Nov 11 at 8:50










          • Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
            – kelin
            Nov 11 at 8:56













          up vote
          1
          down vote



          accepted







          up vote
          1
          down vote



          accepted






          You can get y position of your label in scroll view like this:



          let myLabelTopYPoint = yourScrollView.convert(myLabel.frame, to: yourScrollView).minY





          share|improve this answer














          You can get y position of your label in scroll view like this:



          let myLabelTopYPoint = yourScrollView.convert(myLabel.frame, to: yourScrollView).minY






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 11 at 8:32

























          answered Nov 11 at 8:08









          Robert Dresler

          1,456218




          1,456218












          • Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
            – Daniel
            Nov 11 at 8:17










          • Try edited answer
            – Robert Dresler
            Nov 11 at 8:32










          • Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
            – Daniel
            Nov 11 at 8:49










          • Didn't you forget to use yourScrollView.convert instead of view.convert?
            – Robert Dresler
            Nov 11 at 8:50










          • Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
            – kelin
            Nov 11 at 8:56


















          • Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
            – Daniel
            Nov 11 at 8:17










          • Try edited answer
            – Robert Dresler
            Nov 11 at 8:32










          • Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
            – Daniel
            Nov 11 at 8:49










          • Didn't you forget to use yourScrollView.convert instead of view.convert?
            – Robert Dresler
            Nov 11 at 8:50










          • Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
            – kelin
            Nov 11 at 8:56
















          Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
          – Daniel
          Nov 11 at 8:17




          Thanks, but that always gives me "0" - I need the point relative to the navigation bar rather than to itself. Unless I'm doing something wrong?
          – Daniel
          Nov 11 at 8:17












          Try edited answer
          – Robert Dresler
          Nov 11 at 8:32




          Try edited answer
          – Robert Dresler
          Nov 11 at 8:32












          Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
          – Daniel
          Nov 11 at 8:49




          Unfortunately again myLabel.frame gives 0,0 so scrolls to the top of the page. Thanks for trying
          – Daniel
          Nov 11 at 8:49












          Didn't you forget to use yourScrollView.convert instead of view.convert?
          – Robert Dresler
          Nov 11 at 8:50




          Didn't you forget to use yourScrollView.convert instead of view.convert?
          – Robert Dresler
          Nov 11 at 8:50












          Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
          – kelin
          Nov 11 at 8:56




          Seems as a correct answer to me. Or may be your scrollView's top is constrained to the top of the screen instead of navigation bar.
          – kelin
          Nov 11 at 8:56


















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