[IOS开发教程] IOS UIDevice & IOS检测屏幕旋转实例
2015-12-26 17:11
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| UIDevice类提供了一个单例实例代表当前的设备。从这个实例中可以获得的信息设备，比如操作系统名称、电池电量值(batteryLevel)、电池状态(batteryState)、设备的类型(model，比如iPod、iPhone等)、设备的系统(systemVersion) 屏幕的旋转朝向可以通过 [[UIDevice currentDevice]orientation] http://www.kmnk03.com/hxpfk/qcd/392.html判断，orientation是个Integer类型，每个值表示相应的朝向，必须在调用beginGeneratingDeviceOrientationNotifications方法后，此orientation属性才有效，否则一直是0。 // // ViewController.m // #import "ViewController.h" @interface ViewController () /** * UIImageView */ @property(http://www.kmnk03.com/hxpfk/qcd/393.htmlnonatomic,strong)UIImageView *imageView; @end @implementation ViewController - (void)handleDeviceOrientationhttp://www.kmnk03.com/hxpfk/qcd/394.htmlDidChange:(UIInterfaceOrientation)interfaceOrientation { //1.获取 当前设备 实例 UIDevice *device = [UIDevice currentDevice] ; /** * 2.取得当前Device的方向，Device的方向类型为Integer * * 必须调用beginGeneratingDeviceOrientationNotifications方法后，此http://www.kmnk03.com/hxpfk/qcd/395.htmlorientation属性才有效，否则一直是0。orientation用于判断设备的朝向，与应用UI方向无关 * * @param device.orientation * */ switch (device.orientation) { case UIDeviceOrientationFaceUp: NSLog(@"屏幕朝上平躺"); break;http://www.kmnk03.com/hxpfk/qcd/396.html case UIDeviceOrientationFaceDown: NSLog(@"屏幕朝下平躺"); break; //系統無法判斷目前Device的方向，有可能是斜置 case UIDeviceOrientationUnknown: NSLog(@"未知方向"); break;http://www.kmnk03.com/hxpfk/qcd/397.html case UIDeviceOrientationLandscapeLeft: NSLog(@"屏幕向左横置"); break; case UIDeviceOrientationLandscapeRight: NSLog(@"屏幕向右橫置"); break;http://www.kmnk03.com/hxpfk/qcd/398.html case UIDeviceOrientationPortrait: NSLog(@"屏幕直立"); break; case UIDeviceOrientationPortraitUpsideDown: NSLog(@"屏幕直立，上下顛倒"); break; default: NSLog(@"无法辨识"); break;http://www.kmnk03.com/hxpfk/qcd/399.html } } - (void)viewDidLoad { //设备名称 e.g. "My iPhone" NSString *strName = [[UIDevice currentDevice] name]; NSLog(@"设备名称：%@", strName);http://www.kmnk03.com/hxpfk/qcd/400.html /** * 系统名称 e.g. @"iOS" */ NSString *strSysName = [[UIDevice currentDevice] systemName]; NSLog(@"系统名称：%@", strSysName); /** * 系统版本号 e.g. @"4.0" */ NSString *strSysVersion = [[UIDevice currentDevice] systemVersion]; NSLog(@"系统版本号：%@", strSysVersion); /** * 设备类型 e.g. @"iPhone", @"iPod touch" */ NSString *strModel = [[UIDevice currentDevice] model]; NSLog(@"设备类型：%@", strModel); /** * 本地设备模式 localized version of model */ NSString *strLocModel = [[UIDevice currentDevice] localizedModel]; NSLog(@"本地设备模式：%@", strLocModel); /** * UUID 可用于唯一地标识该设备 */http://www.kmnk03.com/hxpfk/qcd/401.html NSUUID *identifierForVendor = [[UIDevice currentDevice] identifierForVendor]; NSLog(@"UUID：%@", identifierForVendor.UUIDString); /** * UIImage 对象 */ UIImage *image = [UIImage imageNamed:@"scroll.jpg"]; self.imageView.image = image; // 设置图片范围 CGFloat imageH = image.size.height; CGFloat imageW = image.size.width; CGFloat imageX = 0; CGFloat imageY = 0; self.imageView.frame = CGRectMake(imageX, imageY, imageW, imageH); [self.view addSubview:self.imageView]; [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } -(void)viewDidAppear:(BOOL)animated { /** * 开始生成 设备旋转 通知 */ [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; /** * 添加 设备旋转 通知 * * @param handleDeviceOrientationDidChange: handleDeviceOrientationDidChange: description * * @return return value description */ [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleDeviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil ]; } -(void)viewDidDisappear:(BOOL)animated { /** * 销毁 设备旋转 通知 * * @return return value description */ [[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil ]; /** * 结束 设备旋转通知 * * @return return value description */ [[UIDevice currentDevice]endGeneratingDeviceOrientationNotifications]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma 懒加载 - (UIImageView *)imageView { if (!_imageView) { _imageView = [[UIImageView alloc] init]; } return _imageView; } kmnk03.com www.kmnk03.c0m @end |
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