1 CGFloat deviceHeight = [UIScreen mainScreen].bounds.size.height;2 CGFloat deviceWidth = [UIScreen mainScreen].bounds.size.width;3 CGFloat backGroundViewW = 0;4 //设备为mini5 if (deviceWidth > deviceHeight) {6     backGroundViewW = deviceWidth;7 } else { //设备为air8     backGroundViewW = deviceHeight;9 }

 1 - (void)viewDidLoad{ 2     [super viewDidLoad]; 3      4     //添加登录界面 5     [self setupLoginView]; 6      7     //监听文本框 8     [self listenTextField]; 9     10     //单击其它区域隐藏键盘11     [self hideKeyBoardWithClickArea];12 }

 1 //账号、密码输入框的监听 2 -(void)listenTextField{ 3     [self.accountField addTarget:self action:@selector(textFieldBeginEdit:) forControlEvents:UIControlEventEditingDidBegin]; 4     [self.accountField addTarget:self action:@selector(textFieldEndEdit:) forControlEvents:UIControlEventEditingDidEnd]; 5     [self.passwordField addTarget:self action:@selector(textFieldBeginEdit:) forControlEvents:UIControlEventEditingDidBegin]; 6     [self.passwordField addTarget:self action:@selector(textFieldEndEdit:) forControlEvents:UIControlEventEditingDidEnd]; 7 } 8  9 //开始编辑时，整体上移10 -(void)textFieldBeginEdit:(UITextField *)textField{11     [self moveView:-150];12 }13 14 //结束编辑后，移回原来位置15 -(void)textFieldEndEdit:(UITextField *)textField{    16     [self moveView:150];17 }

 1 //view移动的具体方法 2 -(void) moveView:(float)move{ 3     NSTimeInterval animationDuration = 0.3f; 4     CGRect frame = self.view.frame; 5     CGFloat deviceHeight = [UIScreen mainScreen].bounds.size.height; 6     CGFloat deviceWidth = [UIScreen mainScreen].bounds.size.width; 7     //判断设备为ipad air,并且是否倒置 8     if (deviceHeight > deviceWidth && self.interfaceOrientation==4) { 9         //view的X轴上移,pad air10         frame.origin.x += move;11     } else if (deviceHeight > deviceWidth && self.interfaceOrientation==3){12         frame.origin.x -= move;13     } else { //为mini14         frame.origin.y += move;15     }16     17     self.view.frame = frame;18     [UIView beginAnimations:@"2" context:nil];// 2是动画的标示，19     [UIView setAnimationDuration:animationDuration];20     self.view.frame = frame;21     [UIView commitAnimations];22 }

 1 //点击其它区域隐藏键盘 2 -(void)hideKeyBoardWithClickArea{ 3     UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(hideKeyBoard)]; 4     //确认是单击其他区域，而不是双击等其它操作 5     gesture.numberOfTapsRequired = 1; 6     [self.view addGestureRecognizer:gesture]; 7      8     //点击键盘右下角“隐藏键盘”那个按钮，关闭键盘并且恢复view的位置 9     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideKeyBoard) name:UIKeyboardWillHideNotification object:nil];10 }11 12 -(void)hideKeyBoard{13     [self.accountField resignFirstResponder];14     [self.passwordField resignFirstResponder];15     [self resumeView];16 }17 18 //恢复view的原来位置19 -(void)resumeView{20     NSTimeInterval animationDuration=0.5f;21     [UIView beginAnimations:@"3" context:nil];22     [UIView setAnimationDuration:animationDuration];23     [UIView commitAnimations];24 }