关于IOS屏幕的旋转问题

处理IPhone屏幕的旋转是我们经常遇到的，当你做一个应用既然满足竖屏又要满足横屏，这就要求我们会处理屏幕旋转的问题！

方法一：自动布局

1.将项目中界面的四种手持方式都点上；

2.取消Use Autolayout;

3.选择界面中某个控件然后到属性工具栏中去找到AutoSizing功能，勾选对应的绝对定位的线条

4.重写可以旋转的方法

-(BOOL)shouldAutorotate
{
    return YES;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}

方法二：手动布局一（通过代码改view种控件的坐标）

1.重写可以旋转的方法

-(BOOL)shouldAutorotate
{
    return YES;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}

3.取消Use Autolayout

4.代码实现：

//每当屏幕旋转的时候都会触发一个
-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    //如果是是横屏状态
    if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft )
    {
        self.l1.frame = CGRectMake(20, 25, 110, 110);
        self.l2.frame = CGRectMake(162, 25, 110, 110);
        self.l3.frame = CGRectMake(304, 25, 110, 110);
        self.r1.frame = CGRectMake(20, 178, 110, 110);
        self.r2.frame = CGRectMake(162, 178, 110, 110);
        self.r3.frame = CGRectMake(304, 178, 110, 110);}
}

1.在xib文件中拖一个view控件，选择Orientation属性为横屏

2.布局好界面

3.将横纵view分别在controller.h文件中创建对应的属性，命名为

@property (retain, nonatomic) IBOutlet UIView *landspaceView;

@property (retain, nonatomic) IBOutlet UIView *portatiorView;

宏定义实现角度转弧度

#define degreesToRadia(x) (M_PI * (x) / 180)//参数要加括号 ，尤其是参数附近特别要加括号

-(BOOL)shouldAutorotate
{
    return YES;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}
//每当屏幕旋转的时候都会触发一个
-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    //如果是是横屏状态
    if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft )
    {
//        self.l1.frame = CGRectMake(20, 25, 110, 110);
//        self.l2.frame = CGRectMake(162, 25, 110, 110);
//        self.l3.frame = CGRectMake(304, 25, 110, 110);
//        self.r1.frame = CGRectMake(20, 178, 110, 110);
//        self.r2.frame = CGRectMake(162, 178, 110, 110);
//        self.r3.frame = CGRectMake(304, 178, 110, 110);
        self.view = self.landspaceView;
        //self.view.transform = CGAffineTransformIdentity;
        self.view.transform = CGAffineTransformMakeRotation(degreesToRadia(270));
        self.view.bounds = CGRectMake(0, 0, 480, 300);
    }
    else if(toInterfaceOrientation == UIInterfaceOrientationLandscapeRight)
    {
//        self.l1.frame = CGRectMake(37, 20, 110, 110);
//        self.l2.frame = CGRectMake(37, 162, 110, 110);
//        self.l3.frame = CGRectMake(37, 304, 110, 110);
//        self.r1.frame = CGRectMake(190, 20, 110, 110);
//        self.r2.frame = CGRectMake(190, 162, 110, 110);
//        self.r3.frame = CGRectMake(190, 304, 110, 110);
        self.view = self.landspaceView;
        //self.view.transform = CGAffineTransformIdentity;
        self.view.transform = CGAffineTransformMakeRotation(degreesToRadia(90));
        self.view.bounds = CGRectMake(0, 0, 480, 300);
    }
    else if (toInterfaceOrientation == UIInterfaceOrientationPortrait)
    {
        self.view = self.portatiorView;
        self.view.transform = CGAffineTransformIdentity;
        self.view.bounds = CGRectMake(0, 0, 320, 460);
    }
    else if(toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
    {
        self.view = self.portatiorView;
        //self.view = self.landspaceView;
        //self.view.transform = CGAffineTransformIdentity;
        self.view.transform = CGAffineTransformMakeRotation(degreesToRadia(180));
        self.view.bounds = CGRectMake(0, 0, 320, 460);
    }
}