1 文本输入，键盘显示时，view向上，键盘隐藏时，view向下
1.1 注册键盘显示，关闭通知，并实现主界面上下变动
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotificationobject:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotificationobject:nil];
}-(void)keyboardWillShow:(NSNotification *)aNotification
{
CGRect keyBoardRect=[[[aNotification userInfo]objectForKey:UIKeyboardFrameBeginUserInfoKey]CGRectValue];
NSTimeInterval animalInterval=[[[aNotification userInfo]objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
CGRect frame=self.view.frame;
frame.origin.y=-keyBoardRect.size.height;
[UIView beginAnimations:@"keyboardshow"context:nil];
[UIView setAnimationDuration:animalInterval];
self.view.frame=frame;
[UIView commitAnimations];
}-(void)keyboardWillHide:(NSNotification *)aNotification
{
NSTimeInterval animalInterval=[[[aNotification userInfo]objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
CGRect frame=self.view.frame;
frame.origin.y=0;
[UIView beginAnimations:@"keyboardhide"context:nil];
[UIView setAnimationDuration:animalInterval];
self.view.frame=frame;
[UIView commitAnimations];
}
1.2 文本框初始化，并实现UITextViewDelegate委托
self.textbox.returnKeyType=UIReturnKeyDone;
self.textbox.delegate=self;
}- (BOOL)textFieldShouldReturn:(UITextView *)textView
{
[textView resignFirstResponder];returnYES;
}
2 自定义notification
2.1 定义侦听自定义notification观察者
//注册观察者，侦听自定义通知[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(selfNotificationDO:) name:@"CustomNotification"object:nil];
}-(void)selfNotificationDO:(NSNotification *)aNotification
{//处理notification//........}
2.2 生成一个自定义notification
//生成一个自定义Notification[[NSNotificationCenter defaultCenter] postNotificationName:@"CustomNotification"object:self];