1.注册通知
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
// 键盘高度变化通知，ios5.0新增的
#ifdef __IPHONE_5_0
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 5.0) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:)name:UIKeyboardWillChangeFrameNotification object:nil];
}
#endif
}
2.
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
self.bzView.frame = CGRectMake(0, self.view.bounds.size.height-216-44, 320, 44);
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
self.bzView.frame = CGRectMake(0, self.view.bounds.size.height-44, 320, 44);
return YES;
}
#pragma mark -键盘弹出时调用的方法
#pragma mark Responding to keyboard events
- (void)keyboardWillShow:(NSNotification*)notification {
NSDictionary *userInfo = [notification userInfo];
// Get the origin of the keyboard when it's displayed.
NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [aValue CGRectValue];
self.bzView.frame = CGRectMake(0, self.view.bounds.size.height-keyboardRect.size.height-44, 320, 44);
}
-(void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self];//在视图控制器消除时，移除键盘事件的通知
}