UITextFiled 通知监听

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(textFiledEditChanged:)
                                                name:@"UITextFieldTextDidChangeNotification"
                                              object:self.jobTextField];

- (void)textFiledEditChanged:(NSNotification *)obj {
    UITextField *textField = (UITextField *)obj.object;

　　// 自己的业务逻辑

}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

UITextFiled 通知监听

原文：http://www.cnblogs.com/lisen-lisen/p/4613167.html