iPhone屏幕旋转的例子

先在interface builder上放上6个rectbutton，竖放，一排三个

然后我们下面来看代码

.h文件代码

 

 1 //
 2 //  AutoSizeViewController.h
 3 //  AutoSize
 4 //
 5 //  Created by Scott on 10-10-26.
 6 //  Copyright 2010 __MyCompanyName__. All rights reserved.
 7 //
 8 
 9 #import <UIKit/UIKit.h>
10 
11 @interface AutoSizeViewController : UIViewController {
12     UIButton *button1;
13     UIButton *button2;
14     UIButton *button3;
15     UIButton *button4;
16     UIButton *button5;
17     UIButton *button6;
18 }
19 
20 @property (nonatomic,retain) IBOutlet UIButton *button1;
21 @property (nonatomic,retain) IBOutlet UIButton *button2;
22 @property (nonatomic,retain) IBOutlet UIButton *button3;
23 @property (nonatomic,retain) IBOutlet UIButton *button4;
24 @property (nonatomic,retain) IBOutlet UIButton *button5;
25 @property (nonatomic,retain) IBOutlet UIButton *button6;
26 @end
27 

下面我们看.m的代码

//
//  AutoSizeViewController.m
//  AutoSize
//
//  Created by Scott on 10-10-26.
//  Copyright 2010 __MyCompanyName__. All rights reserved.
//

#import "AutoSizeViewController.h"

@implementation AutoSizeViewController

@synthesize button1;
@synthesize button2;
@synthesize button3;
@synthesize button4;
@synthesize button5;
@synthesize button6;


/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/


/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
}
*/



// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}


- (void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
{
    if (interfaceOrientation==UIInterfaceOrientationPortrait || interfaceOrientation==UIInterfaceOrientationPortraitUpsideDown) {
        button1.frame=CGRectMake(20, 20, 125, 125);
        button2.frame=CGRectMake(175, 20, 125, 125);
        button3.frame=CGRectMake(20, 168, 125, 125);
        button4.frame=CGRectMake(175, 168, 125, 125);
        button5.frame=CGRectMake(20, 315, 125, 125);
        button6.frame=CGRectMake(175, 315, 125, 125);
    }else {
        button1.frame=CGRectMake(20, 20, 125, 125);
        button2.frame=CGRectMake(20, 155, 125, 125);
        button3.frame=CGRectMake(177, 20, 125, 125);
        button4.frame=CGRectMake(177, 155, 125, 125);
        button5.frame=CGRectMake(328, 20, 125, 125);
        button6.frame=CGRectMake(328, 155, 125, 125);
    }

}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
    self.button1=nil;
    self.button2=nil;
    self.button3=nil;
    self.button4=nil;
    self.button5=nil;
    self.button6=nil;
    [super viewDidUnload];
}


- (void)dealloc {
    [button1 release];
    button2.release;
    button3.release;
    button4.release;
    button5.release;
    button6.release;
    [super dealloc];
}

@end