Question

我正在开发一个需要根据从Web服务收到的json动态生成UITextField的应用程序。实际上它是一个视图结构。它包含文本字段对象的坐标及其详细信息。我正在使用预定义数量的文本字段生成结构。

 for (int i=0; i<[textFieldsArray count];i++) {

    NSDictionary *textFieldDict = [textFieldsArray objectAtIndex:i];

    switch (i+1) {
        case 1:
            textField1  = [[UITextField alloc]init];
            textField1.tag = i+1;
            textField1.text = [textFieldDict valueForKey:@"text"];
            textField1.frame = CGRectMake(posx,posy,textWidth,textHeight);
            [textField1 addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventTouchDown];
            [self.imageView addSubview:textField1];
            break;
        case 2:
            textField2  = [[UITextField alloc]init];
            textField2.tag = i+1;
            textField2.text = [textFieldDict valueForKey:@"text"];
            textField2.frame = CGRectMake(posx,posy,textWidth,textHeight);
            [self.imageView addSubview:textField2];
            [textField2 addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventTouchDown];
            break;
        case 3:
            textField3  = [[UITextField alloc]init];
            textField3.tag = i+1;
            textField3.text = [textFieldDict valueForKey:@"text"];
            textField3.frame = CGRectMake(posx,posy,textWidth,textHeight);
            [self.imageView addSubview:textField3];
            [textField3 addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventTouchDown];
            break;

        default:
            break;
    }


}

我想将其扩展为无限的文本字段。有没有办法动态创建文本字段。

Answer 1

你必须像这样创建：

for (int i=0; i<[textFieldsArray count];i++) {

    NSDictionary *textFieldDict = [textFieldsArray objectAtIndex:i];
    UITextField *textField  = [[UITextField alloc]init];
    textField.tag = i+1;
    textField.text = [textFieldDict valueForKey:@"text"];
    textField.frame = CGRectMake(posx,posy,textWidth,textHeight);
    [textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventTouchDown];
    [self.imageView addSubview:textField];
}

您可以使用以下代码获取任何文本字段：

UITextField *textField  = (UITextField *)[self.imageView viewWithTag:1];

动态生成UITextFields

1 个答案: