Question

是否可以为3个文本框设置1个计算按钮，或者每个文本框都需要一个按钮，文本框是，桶，加仑和升，如果我在桶中放入10个我希望按钮计算加仑和升10桶是多少。同样，如果我把10英寸放在升数盒子里，我希望按钮能够计算出多少桶和加仑。这是我现在的代码：

- (IBAction)Calculate:(id)sender {
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];

float a = [[numberFormatter numberFromString:_Barrels.text] floatValue];
float b = [[numberFormatter numberFromString:_Gallons.text] floatValue];
float c = [[numberFormatter numberFromString:_Liters.text] floatValue];


_Barrels.text = [[NSString alloc]initWithFormat:@"% .2f", a];
_Gallons.text = [[NSString alloc]initWithFormat:@"% .2f", a * 42];
_Liters.text = [[NSString alloc]initWithFormat:@"% .2f", a * 159];

_Barrels.text = [[NSString alloc]initWithFormat:@"% .2f", b * .0238];
_Gallons.text = [[NSString alloc]initWithFormat:@"% .2f", b];
_Liters.text = [[NSString alloc]initWithFormat:@"% .2f", b * 3.785];

_Barrels.text = [[NSString alloc]initWithFormat:@"% .2f", c * .0063];
_Gallons.text = [[NSString alloc]initWithFormat:@"% .2f", c * .264];
_Liters.text = [[NSString alloc]initWithFormat:@"% .2f", c];

switch ([sender tag]) {
    case 1:
        [_Barrels resignFirstResponder];
        [_Gallons resignFirstResponder];
        [_Liters resignFirstResponder];
        break;
    default:
        break;
}

Answer 1

当然，您可以使用一个按钮来完成所有这三项操作。唯一困难的部分是跟踪用户输入值的bos。

一个按钮用于多个文本框

1 个答案: