需要帮助单位转换器应用程序让 uipicker 调用函数

Question

这一段代码有点不对劲

      - (void)pickerView:(UIPickerView *)
      thePickerView didSelectRow:
     (NSInteger)rowinComponent:(NSInteger)component {
      if ( row ==1) {

    -(IBAction)presstoconvert{

    float number1 = ([initamount.text floatValue ]);
    float answer = number1 *12;
    result.text = [[NSString alloc]initWithFormat:@"%2.f", answer];
    }
}

else ( row == 2);{
    float number1 = ([initamount.text floatValue ]);
    float answer = number1 /12;
    result.text = [[NSString alloc]initWithFormat:@"%2.f", answer];
}

}

Answer 1

为什么在didSelectRow: 中定义pressToConvert？只需删除 -(IBAction)presstoconvert{ 和相应的 } 就可以了。

否则，您可以将pressToConvert 移出此方法体并从此处调用它。