1 --- 弹出键盘屏幕上移

#pragma mark --弹出键盘移动输入框

- (void)viewDidLoad {

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardWillShow:)name:UIKeyboardWillShowNotificationobject:nil];

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardWillHide:)name:UIKeyboardWillHideNotificationobject:nil];

}

//键盘收起

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

CGRectrect =self.view.frame;

rect.origin.y=0;

self.view.frame= rect;

}

//视图上移

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

//拿到正在编辑中的textfield

[selfgetIsEditingView:self.view];

// textfield的位置

CGFloatviewY = [selfscreenViewYValue:self.editingTextField];

//键盘的Y值

NSDictionary*userInfo = [notiuserInfo];

NSValue*value = [userInfoobjectForKey:UIKeyboardFrameEndUserInfoKey];

CGFloatkeyboardEndY = value.CGRectValue.origin.y;

//动画

NSNumber*duration = [userInfoobjectForKey:UIKeyboardAnimationDurationUserInfoKey];

[UIViewanimateWithDuration:duration.doubleValueanimations:^{

if(viewY+30> keyboardEndY) {

CGRectrect =self.view.frame;

rect.origin.y+= keyboardEndY - (viewY+50);

self.view.frame= rect;

}

}];

}

//计算textfield的位置

- (CGFloat)screenViewYValue:(UIView*)textfield {

CGFloaty =0;

for(UIView*view = textfield; view; view = view.superview) {

y += view.frame.origin.y;

if([viewisKindOfClass:[UIScrollViewclass]]) {

//如果父视图是UIScrollView则要去掉内容滚动的距离

UIScrollView* scrollView = (UIScrollView*)view;

y -= scrollView.contentOffset.y;

}

}

returny;

}

//取得正在编辑的textfield

- (void)getIsEditingView:(UIView*)rootView {

for(UIView*subViewinrootView.subviews) {

if([subViewisKindOfClass:[UITextFieldclass]]) {

if(((UITextField*)subView).isEditing) {

self.editingTextField= subView;

return;

}

}

[selfgetIsEditingView:subView];

}

}

//移除通知

- (void)dealloc {

[[NSNotificationCenterdefaultCenter]removeObserver:selfname:UIKeyboardWillShowNotificationobject:nil];

[[NSNotificationCenterdefaultCenter]removeObserver:selfname:UIKeyboardWillHideNotificationobject:nil];

}