加信到字符串目标C若跌破声明

Question

你好是我使用

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的代码。我首先删除了一个字母，但是然后在我的if语句中，我想检查是否向该变量添加了另一个字母，它等于另一个字符串。

任何人都可以看到我错了

下面是从

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 

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的nslogs输出样品感谢你

Answer 1

您必须添加.png在你做if测试后。用你的例子，你现在的做法是将9添加到club.png中，这会让club.png9不是club9，所以你的测试永远不会满足。

最简单的方法可能会不追加在第一行巴纽，然后在你的if语句，追加两个字母/数字和.png，所以：

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