Programmatically scroll a UIScrollView

Question

I have a UIScrollView which has several views  When a user flicks their finger  the view scrolls to the right or left depending on the direction of the finger flick  Basically my code works in a way similar to the iPhone photo app   Now  is there a way that I can programmatically do the same thing so that I end up with a slideshow that runs on its own with a click of a button and a configurable pause between each scroll   How do you really do slideshows with UIScrollView

User · Answer

scrollView setContentOffset CGPoint x  y  y  x   animated  true

User · Answer

You can scroll to some point in a scroll view with one of the following statements in Objective-C   scrollView setContentOffset CGPointMake x  y  animated YES     or Swift  scrollView setContentOffset CGPoint x  x  y  y   animated  true    See the guide  Scrolling the Scroll View Content  from Apple as well   To do slideshows with UIScrollView  you arrange all images in the scroll view  set up a repeated timer  then -setContentOffset animated  when the timer fires   But a more efficient approach is to use 2 image views and swap them using transitions or simply switching places when the timer fires  See iPhone Image slideshow for details

User · Answer

If you want control over the duration and style of the animation  you can do    UIView animateWithDuration 2 0f delay 0 options UIViewAnimationOptionCurveLinear animations        scrollView contentOffset   CGPointMake x  y     completion NULL     Adjust the duration  2 0f  and options  UIViewAnimationOptionCurveLinear  to taste

User · Answer

With Animation in Swift  scrollView setContentOffset CGPointMake x  y   animated  true

User · Answer

Scrollview setContentOffset CGPointMake x  y  animated YES

User · Answer

I m amazed that this topic is 9 years old and the actual straightforward answer is not here   What you re looking for is scrollRectToVisible   animated     Example   extension SignUpView  UITextFieldDelegate       func textFieldDidBeginEditing   textField  UITextField            scrollView scrollRectToVisible textField frame  animated  true            What it does is exactly what you need  and it s far better than hacky contentOffset     This method scrolls the content view so that the area defined by rect   is just visible inside the scroll view  If the area is already   visible  the method does nothing    From  https   developer apple com documentation uikit uiscrollview 1619439-scrollrecttovisible

User · Answer

-  void viewDidLoad        super viewDidLoad       board   UIView alloc initWithFrame CGRectMake 0  0  self view frame size height  80        board backgroundColor  UIColor greenColor        self view addSubview board          Do any additional setup after loading the view      - void viewDidLayoutSubviews         NSString  str   ABCDEFGHIJKLMNOPQRSTUVWXYZ        index 1      for  int i 0  i lt 20  i                  UILabel  lbl   UILabel alloc initWithFrame CGRectMake -50  15  50  50            lbl tag i 1          lbl text  NSString stringWithFormat    c   str characterAtIndex arc4random   str length            lbl textColor  UIColor darkGrayColor           lbl textAlignment NSTextAlignmentCenter          lbl font  UIFont systemFontOfSize 40           lbl layer borderWidth 1          lbl layer borderColor  UIColor blackColor  CGColor           board addSubview lbl               NSTimer scheduledTimerWithTimeInterval 2 target self selector  selector CallAnimation  userInfo nil repeats YES        NSLog    d   board subviews  count       - void CallAnimation        if  index gt 20            index 1            UIView  aView  board viewWithTag index        self doAnimation aView       index        NSLog    d  index      - void doAnimation  UIView  aView        UIView animateWithDuration 10 delay 0 options UIViewAnimationOptionCurveLinear  animations            aView frame CGRectMake self view frame size height  15  50  50                              completion   BOOL isDone                  if  isDone                   do Somthing                         aView frame CGRectMake -50  15  50  50

User · Answer

Swift 3 let point   CGPoint x  0  y  200     200 or any value you like  scrollView contentOffset   point

User · Answer

Here is another use case which worked well for me   User tap a button cell  Scroll to a position just enough to make a target view visible   Code  Swift 5 3    Assuming you have a view named  quot targeView quot  scrollView scroll to  CGPoint x targeView frame minX  y targeView frame minY   animated  true   As you can guess if you want to scroll to make a bottom part of your target view visible then use maxX and minY

User · Answer

Another way is  scrollView contentOffset   CGPointMake x y

[ios] Programmatically scroll a UIScrollView

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