1，注册键盘相应事件
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
2，移除相应事件
- (void)viewDidDisappear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
3，控制view高度
-(void)hidenKeyboard
{
[self.accountFieldItem resignFirstResponder];
[self.passwordFieldItem resignFirstResponder];
}
-(void)nextOnKeyboard:(UITextField *)sender
{
if (sender == self.accountFieldItem)
{
[self.passwordFieldItem becomeFirstResponder];
}
else if (sender == self.passwordFieldItem)
{
[self hidenKeyboard];
}
}
- (void)keyboardWillShow:(NSNotification *)notification {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
if (self.interfaceOrientation != UIDeviceOrientationPortrait &&
self.interfaceOrientation != UIDeviceOrientationPortraitUpsideDown){
[self.scrollView setScrollEnabled:YES];
[self.scrollView setShowsVerticalScrollIndicator:YES];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[self.scrollView setFrame:CGRectMake(CGRectGetMinX(self.view.bounds) + CGRectGetWidth(self.view.bounds)/4 - 20, 0, CGRectGetWidth(self.view.bounds)/2 +40,self.view.frame.size.height)];
[UIView commitAnimations];
}else
{
[self.scrollView setScrollEnabled:NO];
[self.scrollView setShowsVerticalScrollIndicator:NO];
[self.accountFieldItem becomeFirstResponder];
self.scrollView.frame = CGRectMake(CGRectGetMinX(self.view.bounds) + 20,CGRectGetMinY(self.view.bounds) + 25,CGRectGetWidth(self.view.bounds) - 40,self.view.frame.size.height);
}
}
else
{
if (self.interfaceOrientation != UIDeviceOrientationPortrait &&
self.interfaceOrientation != UIDeviceOrientationPortraitUpsideDown){
[self.scrollView setScrollEnabled:YES];
[self.scrollView setShowsVerticalScrollIndicator:YES];
}
else
{
[self.scrollView setScrollEnabled:NO];
[self.scrollView setShowsVerticalScrollIndicator:NO];
}
}
}
- (void)keyboardWillHide:(NSNotification *)notification {
[self.scrollView setScrollEnabled:NO];
[self.scrollView setShowsVerticalScrollIndicator:NO];
[self.scrollView setContentOffset:CGPointMake(0, 0) animated:NO];//将scroll滚动拉动起始位置，然后旋转成竖屏后就不会出现view显示错误，直接从scrollview顶部开始显示，否则又可以只显示了半截或者更少视图
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
if (self.interfaceOrientation != UIDeviceOrientationPortrait &&
self.interfaceOrientation != UIDeviceOrientationPortraitUpsideDown){
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[self.scrollView setFrame:CGRectMake(CGRectGetMinX(self.view.bounds) + CGRectGetWidth(self.view.bounds)/4 - 20, CGRectGetMinY(self.view.bounds) + 25, CGRectGetWidth(self.view.bounds)/2 + 40,self.view.frame.size.height)];
[UIView commitAnimations];
}else
{
self.scrollView.frame = CGRectMake(CGRectGetMinX(self.view.bounds) + 20,CGRectGetMinY(self.view.bounds) + 25,CGRectGetWidth(self.view.bounds) - 40,self.view.frame.size.height);
}
}
}