view.selectNumberTF.text = [NSString stringWithFormat:@"%@",xYGoodsInfo.qidingCount];
//增加通知中心监听，当键盘出现或消失时收出消息
[[NSNotificationCenter defaultCenter] addObserver:view selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:view selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
return view;
}
observer是实例的view，而不是self，self的话是指类了，本来统一用self（类)也行，但是
- (void)keyboardWillShow:(NSNotification *)notification{
//取得键盘最后的frame
CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat height = keyboardFrame.origin.y;
if([_delegate respondsToSelector:@selector(keyboardWillShow:)]){
[_delegate keyboardWillShow:height];
}
}
这个是实例方法，如果用self（类） 不用view（实例）会闪退，
reason: '+[XYOtherIsNOValueView keyboardWillShow:]: unrecognized selector sent to class 0x1111dd010'
类里没这个方法（因为它是实例的），
就算可以把keyboardWillShow改成类方法，但是里面的delegate不能放到类方法里面，
8@}6K2VL(5%W)99UA796P3O.jpg
所以还是乖乖用实例来通知吧
ps:
- (void)dealloc{
//
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
self写在类方法里代表类，写在实例方法里代表实例。
传值
ps:记得移除观察者
- (void)dealloc{
//
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
貌似只有观察者才有移除一说，发布的没有
