uiview aniamtion

- (void)applicationDidFinishLaunching:(UIApplication *)application

{

    //  Create the application's window and set its background color.

    CGRect windowRect = [[UIScreen mainScreen] applicationFrame];

    UIWindow *window = [[UIWindow alloc] initWithFrame:windowRect];

    [window setBackgroundColor:[UIColor lightGrayColor]];

    

    [self setWindow:window];

    

    //  Create an empty view with a different background color so we can

    //  see something on the screen. The four float constants define the

    //  x, y, width, and height of the view's frame rectangle.

    //

    CGRect viewRect1 = { 80.0, 200.0, 160.0, 100.0 };

    WiggleView *wiggleView1 = [[WiggleView alloc] initWithFrame:viewRect1];

    [wiggleView1 setBackgroundColor:[UIColor darkGrayColor]];

    

    //  Create another view half the size of the first one with a 

    //  different background color.

    //

    CGRect viewRect2 = { 0.0, 340.0, 80.0, 50.0 };

    WiggleView *wiggleView2 = [[WiggleView alloc] initWithFrame:viewRect2];

    [wiggleView2 setBackgroundColor:[UIColor purpleColor]];

    

    //  Add the two views to the subviews array so that wiggleView1 is on top 

    //  of wiggleView2

    //

    [window addSubview:wiggleView2];

    [window addSubview:wiggleView1];

    [window makeKeyAndVisible];

    

    //  Send wiggle and fly messages to the subviews

    //

    [wiggleView1 wiggle];

    [wiggleView2 fly];

    

    [window release];

    [wiggleView1 release];

    [wiggleView2 release];

}

//////////////////////////////////////////////////////////////////////////////

#import "WiggleView.h"

#import <QuartzCore/QuartzCore.h>

@implementation WiggleView

//  These compiler directives add some nice formatting to the Xcode dropdown

//  above (which should read "@implementation WiggleView").

//  The first directive causes the menu to draw a line; the second, causes it 

//  to add the heading, "Transform and Animate."

//

#pragma mark -

#pragma mark Transform and Animate

//  Make the view wiggle.!

//

- (void)wiggle

{

    // Start of animation block.

    [UIView beginAnimations:nil context:NULL];

    

    // Animation settings.

    [UIView setAnimationDuration:0.25];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

    [UIView setAnimationRepeatCount:12.5];

    [UIView setAnimationRepeatAutoreverses:YES];

    

    // Transformation. Rotates the view .075 radians.

    [self setTransform:CGAffineTransformMakeRotation(-0.75)];

    

    // End of animation block -- commit the animations.

    [UIView commitAnimations];

}

//  Mke the view fly.

//

- (void)fly

{

    // Start animation block.

    [UIView beginAnimations:nil context:NULL];

    

    // Animation settings.

    [UIView setAnimationDuration:1.75];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    

    //  Transformations. Translate by 200 pixels on the x axis and -300 pixels

    //  on the y axis, and scale down from twice its original size. Note that

    //  because these are matrix transformations, order matters here.

    //

    [self setTransform:CGAffineTransformMakeScale(2.0, 2.0)];

    //[self setTransform:CGAffineTransformMakeTranslation(200.0, -300.0)];

    

    // End animation block.

    [UIView commitAnimations];    

}

@end

////////////////////////////////////////////////////////////////////////////