UItextField自动随键盘

//增加监听，当键盘出现或改变时收出消息

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification
object:nil];

//增加监听，当键退出时收出消息

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification
object:nil];

#pragma mark - 登陆按钮位置变动

//当键盘出现或改变时调用

- (void)keyboardWillShow:(NSNotification *)aNotification {

//获取键盘的高度

NSLog(@"%f",self.landButton.frame.origin.y);

NSDictionary *userInfo = [aNotification userInfo];

NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [aValue CGRectValue];

int height = keyboardRect.size.height;

if (height==0) {

height =
282;

}

if (keyboardSportBool==NO) {

keyboardSportBool=YES;

CGRect landButtonRect =
self.landButton.frame;

CGRect loginLabelRect =
self.loginLabel.frame;

landButtonRect.origin.y-=(height/2);

loginLabelRect.origin.y-=(height/2);

self.landButton.frame = landButtonRect;

self.loginLabel.frame = loginLabelRect;

}

NSLog(@"%f",self.landButton.frame.origin.y);

}

//当键退出时调用

- (void)keyboardWillHide:(NSNotification *)aNotification{

NSDictionary *userInfo = [aNotification userInfo];

NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [aValue CGRectValue];

int height = keyboardRect.size.height;

if (keyboardSportBool==YES) {

keyboardSportBool=NO;

CGRect landButtonRect =
self.landButton.frame;

CGRect loginLabelRect =
self.loginLabel.frame;

landButtonRect.origin.y+=(height/2);

loginLabelRect.origin.y+=(height/2);

self.landButton.frame = landButtonRect;

self.loginLabel.frame = loginLabelRect;

}

}