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copied!<p>Since your are not posting all of your code here, so I have to guess.</p> <p>Are you creating imageView in <code>onTimer</code> and then trying to move "them" in <code>onTimer2</code>?</p> <p>If YES, then</p> <p>Because you are always setting the <code>imageView</code> var to the latest imageView you created in <code>onTimer</code> method, when you trying move the <code>imageView</code> in <code>onTimer2</code> method, you are only moving the latest one you created.</p> <p>In order to move every imageView you've created, you'd better have a <code>for loop</code> in your <code>onTimer2</code> method.</p> <p>In additional, you'd better make a NSMutableArray to save all your imageViews, or you can use <code>imageView.tag</code> to get your imageView again without having to create an NSMutableArray and release it later.</p> <p>Here is an example how to use NSMutableArray to save and read all of your imageViews:</p> <p>Add this to your class's <code>.h</code> file:</p> <pre><code>NSMutableArray *views; NSMutableArray *XArray; NSMutableArray *YArray; </code></pre> <p>Edit your <code>.m</code> file:</p> <pre><code>... //Create an array some where in your class: views = [[NSMutableArray array] retain]; XArray = [[NSMutableArray array] retain]; YArray = [[NSMutableArray array] retain]; ... - (void)onTimer { [XArray addObject:[NSNumber numberWithFloat:(240.0f - ix)/230.0f]]; [YArray addObject:[NSNumber numberWithFloat:(160.0f - iy)/230.0f]]; UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image.png"]]; [self.view addSubview:imageView]; [views addObject:imageView]; [imageView release]; } //Read: - (void)onTimer2 { for (NSUInteger i = 0; i < [views count]; i++) { UIImageView *imageView = [views objectAtIndex:i]; CGFloat X = [[XArray objectAtIndex:i] floatValue]; CGFloat Y = [[YArray objectAtIndex:i] floatValue]; CGPointMake(imageView.center.x + X, imageView.center.y + Y); } } - (void)dealloc { ... [views release]; [XArray release]; [YArray release]; ... } </code></pre> <p>Or you can use <code>imageView.tag</code> like this:</p> <p>Add this to your class's <code>.h</code> file:</p> <pre><code>NSInteger imageViewCount; </code></pre> <p>Edit your <code>.m</code> file:</p> <pre><code>... #define kImageViewFirstTag 10000 ... ... //reset the count some where in your class if needed imageViewCount = 0; ... - (void)onTimer { UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image.png"]]; [self.view addSubview:imageView]; [views addObject:imageView]; imageView.tag = kImageViewFirstTag + imageViewCount; imageViewCount ++; [imageView release]; } //Read: - (void)onTimer2 { for (NSUInteger i = 0; i < imageViewCount; i++) { UIImageView *imageView = (UIImageView *)[self.view viewWithTag:kImageViewFirstTag + i]; CGPointMake(imageView.center.x + X, imageView.center.y + Y); } } </code></pre> <p>The two code are compiled by brain, correct me if there is any mistype.</p> <p><strong>The first way is recommended, because it has better performance.</strong></p>

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