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copied!<p>I believe you want to animate the heights of the bars in the bargraph. I suggest you implement each bar as a separate UIview, a simple rectangle. You can also put all of them in one view with a custom drawRect. Then you need to scale these views or change their frame inside the animation block of either of the following methods:</p> <pre><code>+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion </code></pre> <p>OR</p> <pre><code>+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations </code></pre> <p>For a great tutorial see <a href="http://www.raywenderlich.com/2454/how-to-use-uiview-animation-tutorial" rel="nofollow">this</a>.</p> <p>This is an example if you don't have a lot of time.</p> <pre><code>[UIView animateWithDuration:1//Amount of time the animation takes. delay:0//Amount of time after which animation starts. options: UIViewAnimationCurveEaseOut//How the animation will behave. animations:^{ //here you can either set a CGAffineTransform, or change your view's frame. //Both will work just fine. yourBarView.transform = CGAffineTransformMakeScale ( scaleForX,//say 1, you dont want it to change. scaleForY//say 20, you want to make it 20 times larger in the y //direction. //Note* to animate from a zero height to a finite height change the //view's frame. //yourBarView.frame = CGRectMake(0,0,20,100); ); } completion:^(BOOL finished){//This block is called when the animation completes. NSLog(@"Done!"); }]; </code></pre>

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