Question

您可能知道我对iOS开发非常陌生并且有一个非常具体的问题。我需要编写一个if ... else语句，在if中有四个条件，然后才会执行实际操作。所以我需要做这样的事情：

如果（条件1 +条件2 +条件3 +条件4）然后 {实际行动} 其他 .....................

当我尝试

时

-(IBAction)Buttontouched: (id) sender;
{
    if (NSOrderedSame == [self.InputField1.text caseInsensitiveCompare:@"teacher"]){
        if (NSOrderedSame == [self.InputField2.text caseInsensitiveCompare:@"Maths"]){
            if (NSOrderedSame == [self.InputField3.text caseInsensitiveCompare:@"english"]){
                if (NSOrderedSame == [self.InputField4.text caseInsensitiveCompare:@"greek"]){
                    NumberCount = NumberCount +5;
                    ErrorLabel.text = [NSString stringWithFormat:@"You have achived %i out of 50 points", >NumberCount];
                    April1.hidden = true;
                }
            }
        }
     }
}

它不起作用......请帮助我！

Answer 1

您可以这样做，只有在所有4个陈述都为真的情况下才会继续。

-(IBAction)Buttontouched: (id) sender {
    if ((NSOrderedSame == [self.InputField1.text caseInsensitiveCompare:@"teacher"]) &&
        (NSOrderedSame == [self.InputField2.text caseInsensitiveCompare:@"Maths"]) &&
        (NSOrderedSame == [self.InputField3.text caseInsensitiveCompare:@"english"]) &&
        (NSOrderedSame == [self.InputField4.text caseInsensitiveCompare:@"greek"])) 
    {     
        NumberCount = NumberCount +5; 
        ErrorLabel.text = [NSString stringWithFormat:@"You have achived %i out of 50 points", >NumberCount]; 
        April1.hidden = true;
    } else {

    }
}

Answer 2

if ((NSOrderedSame == [self.InputField1.text caseInsensitiveCompare:@"teacher"])&&(NSOrderedSame == [self.InputField2.text caseInsensitiveCompare:@"Maths"])&&(NSOrderedSame == [self.InputField3.text caseInsensitiveCompare:@"english"])&&(NSOrderedSame == [self.InputField4.text caseInsensitiveCompare:@"greek"]))
{
// your code here
}
else
{
//another code here
}

如果所有这些都是真的，我需要4个If语句，然后是1个单独的else语句

2 个答案: