Objective c 尝试对数组排序时崩溃

我正试图在我制作的一款太空射击游戏中获得高分。因此，我要做的是使用以下代码保存分数：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSNumber *highscore = [[NSNumber alloc] initWithInt:_totalSeconds]; 
NSString *choice = [NSString stringWithFormat:@"%@/userschoice", documentsDirectory];
NSMutableArray *array = [NSArray arrayWithContentsOfFile:choice];
[array addObject: highscore];
[array writeToFile:choice atomically:YES];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *choice = [NSString stringWithFormat:@"%@/userschoice", documentsDirectory];
NSMutableArray *array = [NSArray arrayWithContentsOfFile:choice];
int _highscoresAmount = [array count]; 
NSNumber *highscore2 = [[NSNumber alloc] init];
NSNumber *highscore2Two = [[NSNumber alloc] init];

int _count = 0;

while (_count<_highscoresAmount){

    for (int i=0; i<_highscoresAmount; i++){

        int j = i+1; 
        highscore2 = [array objectAtIndex:i];
        highscore2Two = [array objectAtIndex:j];
        if (highscore2Two > highscore2){

            [array replaceObjectAtIndex:i withObject:highscore2Two];
            [array replaceObjectAtIndex:j withObject:highscore2]; 

        }


}

    _count = _count + 1;

}


for (int i=0; i< _highscoresAmount;i++){

    highscore2 = [array objectAtIndex:i];
    NSString *highscore3 = [NSString stringWithFormat:@"%@", highscore2];
    NSLog(highscore3); 

}

其中整数

\u totalSeconds

是用户的分数。然后，在我的

viewDidLoad

函数中，我输入以下代码：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSNumber *highscore = [[NSNumber alloc] initWithInt:_totalSeconds]; 
NSString *choice = [NSString stringWithFormat:@"%@/userschoice", documentsDirectory];
NSMutableArray *array = [NSArray arrayWithContentsOfFile:choice];
[array addObject: highscore];
[array writeToFile:choice atomically:YES];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *choice = [NSString stringWithFormat:@"%@/userschoice", documentsDirectory];
NSMutableArray *array = [NSArray arrayWithContentsOfFile:choice];
int _highscoresAmount = [array count]; 
NSNumber *highscore2 = [[NSNumber alloc] init];
NSNumber *highscore2Two = [[NSNumber alloc] init];

int _count = 0;

while (_count<_highscoresAmount){

    for (int i=0; i<_highscoresAmount; i++){

        int j = i+1; 
        highscore2 = [array objectAtIndex:i];
        highscore2Two = [array objectAtIndex:j];
        if (highscore2Two > highscore2){

            [array replaceObjectAtIndex:i withObject:highscore2Two];
            [array replaceObjectAtIndex:j withObject:highscore2]; 

        }


}

    _count = _count + 1;

}


for (int i=0; i< _highscoresAmount;i++){

    highscore2 = [array objectAtIndex:i];
    NSString *highscore3 = [NSString stringWithFormat:@"%@", highscore2];
    NSLog(highscore3); 

}

NSArray*path=NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）；
NSString*documentsDirectory=[paths objectAtIndex:0]；
NSString*choice=[NSString stringWithFormat:@“%@/userschoice”，documentsDirectory]；
NSMUTABLEARRY*array=[NSArray ARRAYWITHCONTENTSOFILE:choice]；
int_highscoresAmount=[数组计数]；
NSNumber*高分2=[[NSNumber alloc]init]；
NSNumber*highscore2Two=[[NSNumber alloc]init]；
int _计数=0；
while（_count我发现这里有两个主要错误。第一个错误是，您将数组声明为NSMutableArray，但实际上创建了一个NSArray。您需要使用[NSMutableArray arrayWithContentsOfFile:]创建一个可变数组

第二个问题是，您不应该实现自己的排序算法，只需使用内置的排序方法（-sortUsingComparator:例如）

（编辑）

哦，另外，你应该使用-stringByAppendingPathComponent而不是+stringWithFormat来构建路径
我解决了nsmutable数组的第一个问题。该应用程序仍然无法运行。我尝试了stringByAppendingPathComponent，但它向我发出警告，NSString可能不会响应stringByAppendingPathComponent。请继续nd我使用的是xcode 3，因此可能会导致一些问题。您应该发布崩溃日志。在没有崩溃日志的情况下调试崩溃基本上是不可能的。我添加了崩溃日志。另外，可能是objectAtIndex:…没有收到int变量吗？那不是崩溃日志。这只是来自调试器的一堆错误消息。