1、添加方法
[_phoneField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
2、//监听输入框
- (void)textFieldDidChange:(UITextField *)theTextField{
NSLog( @" %@", theTextField.text);
NSLog( @"输入文本长度: %ld", theTextField.text.length);
}
