Xcode4.5.1、iPhone、iOS5、iOS6使用技巧

 1.判断当前设备是iPad还是iPhone\iPod

if([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad){
        NSLog(@"The Device is a iPad!");
    }else{
        NSLog(@"Not a iPad the device!");
}

2.设置横屏或者竖屏或者横竖屏

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
//横屏
    //return UIInterfaceOrientationIsLandscape(interfaceOrientation);
 //竖屏
    //return UIInterfaceOrientationIsPortrait(interfaceOrientation);
//横竖屏
    //return YES;
}

 

iOS5和iOS6横竖屏同时支持

iOS6中抛弃了如下这个方法 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

为了同时支持iOS5和iOS6横竖屏切换，可用如下方法或代码

1 info.plist 中 Supported interface orientations中加入所有方向的支持
2 AppDelegate中加入方法
-(NSUInteger)application:(UIApplication *)application
 supportedInterfaceOrientationsForWindow:(UIWindow *)window{
 return UIInterfaceOrientationMaskAll;
} iOS6中为了后续支持任何方向的旋转
3 任何你想控制旋转的界面中加入方法
// iOS6.0
-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortrait;  // 可以修改为任何方向
}

-(BOOL)shouldAutorotate{
    return YES;
}

// iOS5.0
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return (toInterfaceOrientation == UIInterfaceOrientationPortrait);  // 可以修改为任何方向
}
这样你的app就可以同时支持iOS5和iOS6系统的横竖屏切换了

 

3.导入旧工程，解决Xcode4.5以后模拟器屏幕不旋转问题

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0){
        self.window.rootViewController = navigationCtrl;
    }else{
        [self.window addSubview:navigationCtrl.view];
    }

4.支持iPhone5:添加Retina4 launch image"[email protected]"

图片尺寸：

Default.png  320x480
[email protected]  640x960
[email protected]    640x1136

5.根据iPhone5的宽和高，判断当前设备是不是iPhone5

CGFloat screenWidth = [[UIScreen mainScreen] bounds].size.width;
CGFloat screenHeight = [[UIScreen mainScreen] bounds].size.height;
if ((screenWidth==568)||(screenHeight==568)) {
    isiPhone5 = YES;
}

 注意：iPhone5的高是568，取得屏幕大小用

[UIScreen mainScreen].bounds

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