IOS学习之UITextfield-创新互联

1. UITextFieldDelegate的代理

开始输入的监听：

    // return NO to disallow editing.

    - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField;

输入结束的监听：

   - (void)textFieldDidEndEditing:(UITextField *)textField;

等等。在这些方法中，添加相应的操作。

2.获取UITextField输入内容

[self.accountText addTarget:self action:@selector(input:) forControlEvents:UIControlEventEditingChanged];

- (void) input:(UITextField*)textField {

}

3.监听键盘事件的通知

 [[NSNotificationCenter defaultCenter] addObserver:self

                       selector:@selector(keyboardWillShow:)

                         name:UIKeyboardWillShowNotification

                        object:nil];

  [[NSNotificationCenter defaultCenter] addObserver:self

                       selector:@selector(keyboardShow:)

                         name:UIKeyboardDidShowNotification

                        object:nil];

  [[NSNotificationCenter defaultCenter] addObserver:self

                       selector:@selector(keyboardWillHide:)

                         name:UIKeyboardWillHideNotification

                        object:nil];

  [[NSNotificationCenter defaultCenter] addObserver:self

                       selector:@selector(keyboardHide:)

                         name:UIKeyboardDidHideNotification

                        object:nil];

- (void)keyboardWillShow:(NSNotification *)notif {

}

- (void)keyboardShow:(NSNotification *)notif {

}

- (void)keyboardWillHide:(NSNotification *)notif {

}

- (void)keyboardHide:(NSNotification *)notif {

}

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