为 uiswitch 操作创建 if 语句 [重复]

Question

我想制作一个 uiswitch 按钮来确定我的发薪日估算器应用中是否使用了某个浮点数。请检查 if 和 else 行...我不断收到错误。请帮忙。

代码：

- (IBAction)calculateButtonPressed:(UIButton *)sender
{
    float dailyRate = [self.dailyRateTextField.text floatValue];
    float daysWorked = [self.daysWorkedTextField.text floatValue];
    float grossPay = dailyRate * daysWorked;
    float taxRate = .72;
    float ssRate = .938;
    float medRate = .9855;
    float nillRate = 1;

    if (medTaxSwitchOutlet.on) medRate = medRate;

    else (medTaxSwitchOutlet.on) medRate = nillRate

    if (ssTaxSwitchOutlet.on) ssRate = ssRate

    else (ssTaxSwitchOutlet.on) ssRate = nillRate

    if (fedTaxSwitchOutlet.on) taxRate = taxRate

    else (fedTaxSwitchOutlet.on) taxRate = nillRate

    float netPay = grossPay * taxRate * medRate * ssRate;
    self.dailyRateTextField.text = [NSString stringWithFormat:@"$%.2f", dailyRate];
    self.netIncomeTextField.text = [NSString stringWithFormat:@"$%.2f", netPay];
    self.grossIncomeTextField.text = [NSString stringWithFormat:@"$%.2f", grossPay];

    }

Answer 1

分配后需要分号。
else 关键字后面带括号的测试是错误的，应该删除。

if (medTaxSwitchOutlet.on) medRate = medRate;
else medRate = nillRate;

if (ssTaxSwitchOutlet.on) ssRate = ssRate;
else ssRate = nillRate;

if (fedTaxSwitchOutlet.on) taxRate = taxRate;
else taxRate = nillRate;