奇怪的NSMutable陣列錯誤

Question

我只是簡單地試圖更新我的分數nsmutable數組，它是在我的應用程序運行時調用的（id）類型函數中定義的。所以我不知道發生了什麼問題，我在函數體之前放置了一個NSLog，然後檢查發生了什麼，然後我會在代碼之後發佈它們。

-(void)changeScore:(int)moves AtLevel:(int)theLevel{ 
for (int i = 0; i < 20; i++) { 
    NSLog(@"At level %d we have a score of: %d ", i+1, [[scores objectAtIndex:i] intValue]); 
} 
if (theLevel <= 9){ 
    NSNumber* number = [[NSNumber alloc]initWithInt:50 - moves]; 
    [scores replaceObjectAtIndex:theLevel - 1 withObject:number]; 
    NSLog(@"this is number's int value: %d and this is thelevel - 1: %d", [number intValue], theLevel - 1); 
} 
if (theLevel > 9 && theLevel <= 19){ 
    NSNumber* number = [[NSNumber alloc]initWithInt:150-moves]; 
    [scores replaceObjectAtIndex:theLevel - 1 withObject:number]; 
} 
for (int i = 0; i < 20; i++) { 
    NSLog(@"At level %d we have a score of: %d", i+1, [[scores objectAtIndex:i] intValue]); 
} 
} 

和NSLog的產生這樣的：

2012-04-14 14:53:49.018 Arctic Defender[2068:f803] At level 1 we have a score of: 0 
2012-04-14 14:53:49.022 Arctic Defender[2068:f803] At level 2 we have a score of: 0 
2012-04-14 14:53:49.023 Arctic Defender[2068:f803] At level 3 we have a score of: 0 
2012-04-14 14:53:49.024 Arctic Defender[2068:f803] At level 4 we have a score of: 0 
2012-04-14 14:53:49.026 Arctic Defender[2068:f803] At level 5 we have a score of: 0 
2012-04-14 14:53:49.027 Arctic Defender[2068:f803] At level 6 we have a score of: 0 
2012-04-14 14:53:49.028 Arctic Defender[2068:f803] At level 7 we have a score of: 0 
2012-04-14 14:53:49.029 Arctic Defender[2068:f803] At level 8 we have a score of: 0 
2012-04-14 14:53:49.030 Arctic Defender[2068:f803] At level 9 we have a score of: 0 
2012-04-14 14:53:49.031 Arctic Defender[2068:f803] At level 10 we have a score of: 0 
2012-04-14 14:53:49.032 Arctic Defender[2068:f803] At level 11 we have a score of: 0 
2012-04-14 14:53:49.033 Arctic Defender[2068:f803] At level 12 we have a score of: 0 
2012-04-14 14:53:49.035 Arctic Defender[2068:f803] At level 13 we have a score of: 0 
2012-04-14 14:53:49.036 Arctic Defender[2068:f803] At level 14 we have a score of: 0 
2012-04-14 14:53:49.101 Arctic Defender[2068:f803] At level 15 we have a score of: 0 
2012-04-14 14:53:49.102 Arctic Defender[2068:f803] At level 16 we have a score of: 0 
2012-04-14 14:53:49.103 Arctic Defender[2068:f803] At level 17 we have a score of: 0 
2012-04-14 14:53:49.104 Arctic Defender[2068:f803] At level 18 we have a score of: 0 
2012-04-14 14:53:49.104 Arctic Defender[2068:f803] At level 19 we have a score of: 0 
2012-04-14 14:53:49.105 Arctic Defender[2068:f803] At level 20 we have a score of: 0 
2012-04-14 14:53:49.106 Arctic Defender[2068:f803] this is number's int value: 38 and this is thelevel - 1: 0 
2012-04-14 14:53:49.111 Arctic Defender[2068:f803] At level 1 we have a score of: 0 
2012-04-14 14:53:49.112 Arctic Defender[2068:f803] At level 2 we have a score of: 0 
2012-04-14 14:53:49.113 Arctic Defender[2068:f803] At level 3 we have a score of: 0 
2012-04-14 14:53:49.114 Arctic Defender[2068:f803] At level 4 we have a score of: 0 
2012-04-14 14:53:49.114 Arctic Defender[2068:f803] At level 5 we have a score of: 0 
2012-04-14 14:53:49.135 Arctic Defender[2068:f803] At level 6 we have a score of: 0 
2012-04-14 14:53:49.136 Arctic Defender[2068:f803] At level 7 we have a score of: 0 
2012-04-14 14:53:49.137 Arctic Defender[2068:f803] At level 8 we have a score of: 0 
2012-04-14 14:53:49.138 Arctic Defender[2068:f803] At level 9 we have a score of: 0 
2012-04-14 14:53:49.157 Arctic Defender[2068:f803] At level 10 we have a score of: 0 
2012-04-14 14:53:49.159 Arctic Defender[2068:f803] At level 11 we have a score of: 0 
2012-04-14 14:53:49.160 Arctic Defender[2068:f803] At level 12 we have a score of: 0 
2012-04-14 14:53:49.160 Arctic Defender[2068:f803] At level 13 we have a score of: 0 
2012-04-14 14:53:49.163 Arctic Defender[2068:f803] At level 14 we have a score of: 0 
2012-04-14 14:53:49.165 Arctic Defender[2068:f803] At level 15 we have a score of: 0 
2012-04-14 14:53:49.166 Arctic Defender[2068:f803] At level 16 we have a score of: 0 
2012-04-14 14:53:49.167 Arctic Defender[2068:f803] At level 17 we have a score of: 0 
2012-04-14 14:53:49.169 Arctic Defender[2068:f803] At level 18 we have a score of: 0 
2012-04-14 14:53:49.170 Arctic Defender[2068:f803] At level 19 we have a score of: 0 
2012-04-14 14:53:49.171 Arctic Defender[2068:f803] At level 20 we have a score of: 0 

編輯：這是我的分數initalize代碼：

-(id)initNewScores{ 
//Initalize 20 levels 
for (int i = 0; i < 20; i++) { 
    NSNumber* numb = [[NSNumber alloc] initWithInt:0]; 
    [scores addObject:numb]; 
    [numb release]; 
} 
return self; 
} 

Answer 1

顯示的scores在進入該方法的價值。我敢打賭它是nil。即不管你用什麼來初始化可變數組都不起作用。