CODEWITHSUNDEEP
iosobjective-cuiscrollview
Lazarus
Lazarus

Reputation: 427

xcode, UIScrollView keep looping scroll animation

Objective

The scroll animation keep looping and keep go on the "AfterDone" method even the animation not yet complete.

- (void) afterAnimationStops{
float newOffSetX = _tableview.bounds.size.width-wContentBgImg;
NSLog(@"Inside AutoMove > %d",LzAutoMove);
if(leftright==1 && LzAutoMove==0)
{
    NSLog(@"Come In > 1");
    LzAutoMove = 1;
    leftright = 2;
    [UIScrollView animateWithDuration:3.0f
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseOut
                     animations:^{
                         [UIScrollView beginAnimations:@"scrollAnimation" context:nil];
                         [UIScrollView setAnimationDuration:3.0f];
                         LzcurrentLocation = (-newOffSetX);
                         [imgCell.scrollview setContentOffset:CGPointMake((-newOffSetX), 0)];
                         [UIScrollView commitAnimations];
                     }
                     completion:^(BOOL finished){
                         if (finished) {
                             [self afterDone];
                         }
                     }];
}else{
    if(LzAutoMove==0){
    NSLog(@"Come In > 2");
        LzAutoMove = 1;
        leftright = 1;
        [UIScrollView animateWithDuration:3.0f
                                    delay:0.0f
                                  options:UIViewAnimationOptionCurveEaseOut
                               animations:^{
                                   [UIScrollView beginAnimations:@"scrollAnimation" context:nil];
                                   [UIScrollView setAnimationDuration:3.0f];
                                   LzcurrentLocation = 0;
                                   [imgCell.scrollview setContentOffset:CGPointMake(0, 0)];
                                   [UIScrollView commitAnimations];
                                   //[UIScrollView setAnimationDidStopSelector:@selector(afterDone)];
                               }
                               completion:^(BOOL finished){
                                   if (finished) {
                                       [self afterDone];
                                   }
                               }];

    }

}
}

- (void) afterDone{
    NSLog(@"Done");
    LzAutoMove = 0;
    [self afterAnimationStops];
}

i still learning how to use the "animation completed" method, is that any one can show me where i doing wrong? thanks!

Upvotes: 0

Views: 833

Answers (1)

Casey
Casey

Reputation: 103

You can use UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse flags for your animation option, the animation will auto repeat and reverse to original state after each completion.

[UIView animateWithDuration:3.0f
                            delay:0.0f
                          options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse
                       animations:^{
                           [imgCell.scrollview setContentOffset:contentOffset];
                       }
                       completion:^(BOOL finished){
                       }];

Upvotes: 2

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