Implementation of Automatic scrollview scrolling in iOS

. H文[ [plain] @ interface Interface1: UIViewController {IBOutlet UIScrollView * scroller; IBOutlet UILabel * warnung;} @ property (nonatomic, retain) IBOutlet UIScrollView * scrollView ;. m file [plain]-(void) viewDidAppear :( BOOL) animated {[super viewDidAppear: animated]; CGPoint bottomOffset = CGPointMake (self. scrollView. contentOffset. x, self. scrollView. contentSize. height-self. scrollView. bounds. size. height); [self. scrollView setContentOffset: bottomOffset animated: NO]; CGPoint newOffset = self. scrollView. contentOffset; newOffset. y = 0; [self. scrollView setContentOffset: newOffset animated: YES];}-(void) viewDidLoad {[scroller setScrollEnabled: YES]; [scroller setContentSize: CGSizeMake (320,420)]; [super viewDidLoad]; use setContentOffset: animated: [plain] UIScrollView * scrollView = ...; CGPoint newOffset = scrollView. contentOffset; newOffset. y = 0; [scrollView setContentOffset: newOffset animated: YES]; if you need the opening animation effect, implement [plain]-(void) viewDidLoad {[super viewDidLoad] In viewcontroller of scrollView; //... CGPoint bottomOffset = CGPointMake (self. scrollView. contentOffset. x, self. scrollView. contentSize. height-self. scrollView. bounds. size. height); [self. scrollView setContentOffset: bottomOffset animated: NO];}-(void) viewDidAppear :( BOOL) animated {[super viewDidAppear: animated]; CGPoint newOffset = self. scrollView. contentOffset; newOffset. y = 0; [self. scrollView setContentOffset: newOffset animated: YES];} slow point of movement, implemented using timer: [plain]-(void) viewDidLoad {[super viewDidLoad]; //... CGPoint bottomOffset = CGPointMake (self. scrollView. contentOffset. x, self. scrollView. contentSize. height-self. scrollView. bounds. size. height); [self. scrollView setContentOffset: bottomOffset animated: NO];}-(void) viewDidAppear :( BOOL) animated {[super viewDidAppear: animated]; CGPoint bottomOffset = CGPointMake (self. scrollView. contentOffset. x, self. scrollView. contentSize. height-self. scrollView. bounds. size. height); // set the delay time float scrollDurationInSeconds = 4.0; // calculate the timer interval float totalScrollAmount = bottomOffset. y; float timerInterval = scrollDurationInSeconds/totalScrollAmount; [NSTimer volume: timerInterval target: self selector: @ selector (scrollScrollView :) userInfo: nil repeats: YES) scrollScrollView :( NSTimer *) timer {CGPoint newScrollViewContentOffset = self. scrollView. contentOffset; // move 1px newScrollViewContentOffset up. y-= 1; newScrollViewContentOffset. y = MAX (0, newScrollViewContentOffset. y); // if it reaches the top, timer suspends if (newScrollViewContentOffset. y = 0) {[timer invalidate];} // finally set scollView's contentOffset self. scrollView. contentOffset = newScrollViewContentOffset ;}