如何关闭连接到 UITextField 的 UIPicker

本文介绍了如何关闭连接到 UITextField 的 UIPicker的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个 UITextField，当推送一个 UIPickerView 时会出现来选择一个值.选择一个值后，如何让 UIPickerView 关闭.另一个线程中的某人告诉我 resignFirstResponder 文本字段，但我的代码不起作用.有任何想法吗?注意:我有两个文本字段和 UI 选择器，这就是为什么我有if"else"语句的原因.

I have a UITextField, and when pushed a UIPickerView comes up to choose a value. How do I get the UIPickerView to dismiss once a value is chosen. Someone in another thread told me to resignFirstResponder the textfield, but my code isn't working. Any ideas? NOTE: I have two text fields and UI Pickers, that's why I have the 'if' 'else' statement.

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    if (textField == self.ageTextField)
    {
        [ageTextField resignFirstResponder];
        [agePickerView removeFromSuperview];
        return YES;
    }
    else
    {
        [relationshipTextField resignFirstResponder];
        [relationshipPickerView removeFromSuperview];
        return YES;
    }
}

推荐答案

实现 UIPickerViewDelegate 协议并实现如下方法:

Implement the UIPickerViewDelegate protocol and implement the following method:

- (void) pickerView: (UIPickerView*) pickerView
       didSelectRow: (NSInteger)     row
        inComponent: (NSInteger)     component
{
  [self.ageTextField resignFirstResponder];
}

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