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POHow to make sure that UIImageView's setImage has completed before the next frame
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  1. POHow to make sure that UIImageView's setImage has completed before the next frame
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    copied!<p>I have some code that continuously generates UIImage frames for animation. Currently I am using a mutable array to save these image objects which can be animated using UIImageView animation methods. Something like following:</p> <pre><code>NSMutableArray *myFrames...; while ( number of frames required ) { create UIImage frame_xx; [myFrames addObject:frame_xx]; } myUImageView.animationImages = myFrames; myUImageView.animationDuration = time_length_for_animation; [myUImageView startAnimating]; </code></pre> <p>The above code works fine, however my problem is that as my animation gets longer then few hundred frames, I start getting memory warnings and eventually the program crashes.</p> <p>What I would ideally like to do is to display each frame immediately rather then generating a bunch of frames for animation. Animation may be a bit slower this way but I will not be limited to the memory. As soon as the frame_xx is displayed I no longer care for that frame and want to display the next frame.</p> <p>I have tried using following and they don't work:</p> <pre><code>[myUImageView setImage:frame_xx] // This only displays the last frame generated in the loop </code></pre> <p>I have also tried creating a new thread:</p> <pre><code> [NSThread detachNewThreadSelector: @selector(displayImage) toTarget:myUImageView withObject:frame_xx]; // again this only shows the last frame generated in the loop </code></pre> <p>So I am looking for help.. how do you display an image frame immediately in UIImageView, sort of like "flush" right after [myUImageView setImage:frame_xxx]</p> <p>Any help on this will be greatly appreciated..</p> <p>KAS</p>
 

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