在目标c if语句中将字母添加到字符串

Question

你好下面是我正在使用的代码

currentCardDisplayed = [NSMutableString stringWithFormat:@"%@.png", [[cardsShuffled objectAtIndex:currentCard-1] substringToIndex:[[cardsShuffled objectAtIndex:currentCard-1] length]-1]];

NSString *rule;

if([[currentCardDisplayed stringByAppendingString:@"e"] isEqualToString:currentCardName]){
    rule = @"drink";
}else if([[currentCardDisplayed stringByAppendingString:@"2"]isEqualToString:currentCardName]){
    rule = @"drink2";
}else if([[currentCardDisplayed stringByAppendingString:@"3"]isEqualToString:currentCardName]){
    rule = @"drink3";
}else if([[currentCardDisplayed stringByAppendingString:@"4"]isEqualToString:currentCardName]){
    rule = @"drink4";
}else if([[currentCardDisplayed stringByAppendingString:@"5"]isEqualToString:currentCardName]){
    rule = @"drink5";
}else if([[currentCardDisplayed stringByAppendingString:@"6"]isEqualToString:currentCardName]){
    rule = @"drink6";
}else if([[currentCardDisplayed stringByAppendingString:@"7"]isEqualToString:currentCardName]){
    rule = @"drink7";
}else if([[currentCardDisplayed stringByAppendingString:@"8"]isEqualToString:currentCardName]){
    rule = @"drink8";
}else if([[currentCardDisplayed stringByAppendingString:@"9"]isEqualToString:currentCardName]){
    rule = @"drink9";
}else if([[currentCardDisplayed stringByAppendingString:@"0"]isEqualToString:currentCardName]){
    rule = @"drink10";
}else if([[currentCardDisplayed stringByAppendingString:@"k"]isEqualToString:currentCardName]){
    rule = @"drinkjack";
}else if([[currentCardDisplayed stringByAppendingString:@"n"]isEqualToString:currentCardName]){
    rule = @"drinkqueen";
}else if([[currentCardDisplayed stringByAppendingString:@"g"]isEqualToString:currentCardName]){
    rule = @"drinkking";
}
NSLog(@" %@ ", currentCardDisplayed);
NSLog(@" %@ ", currentCardName);
NSLog(@"%@", rule);
NSLog(@" %@", [cardsShuffled objectAtIndex:currentCard-1]);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Rules" message:rule delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles:nil, nil];

[alert show];

我试图添加到末尾的字母没有到达那里。我首先删除了一个字母，但是在我的 if 语句中我想检查我是否向该变量添加了一个不同的字母，它是否等于另一个字符串。

谁能看出我哪里出错了

下面是 nslogs 的示例输出

2012-12-11 20:06:50.853 Kings_1.03[4915:c07]  club.png 
2012-12-11 20:06:50.855 Kings_1.03[4915:c07]  club9.png 
2012-12-11 20:06:50.857 Kings_1.03[4915:c07] (null)
2012-12-11 20:06:50.858 Kings_1.03[4915:c07]  club9

感谢任何帮助

谢谢你

Answer 1

您必须在执行 if 测试后添加 .png。使用您的示例，您现在所做的方式是将 9 附加到 club.png，这会给您 club.png9 而不是 club9，因此您的测试永远不会满足。

最简单的方法可能是不在第一行附加那个 .png，然后在你的 if 语句中，附加字母/数字和 .png，所以：

}else if([[currentCardDisplayed stringByAppendingString:@"9.png"]isEqualToString:currentCardName]){
    rule = @"drink9";