Question

我该如何创建新的NSMutableArray？

我有一个NSMutableArray只在会话中存在，当前我按照下面的方法创建它：NSMutableArray *temp = [[NSMutableArray alloc] initWithCapacity:10]; [self setScoreArray:temp]; [temp release];当我检测索引的时候出现了越界错误：NSNumber *previousScore = [[self scoreArray] objectAtIndex:[self quizNum]]; if ( previousScore != nil ) { [self clearQuizBtns]; NSInteger previousScoreValue = [previousScore integerValue]; [self selectButtonAtTag:previousScoreValue]; }else { [self clearQuizBtns]; }我发现是initWithCapacity没有创建数组。所以，最初我应该如何填入数组数据呢？

Answer 1

这段代码给你参考：// scoreDictionary property of NSMutableDictionary class must be declared in selfNSNumber *previousScore = [self.scoreDictionary objectForKey:[NSNumber numberWithInt:[self quizNum]]];if (previousScore != nil) { [self clearQuizBtns]; NSInteger previousScoreValue = [previousScore integerValue]; [self selectButtonAtTag:previousScoreValue];}else { [self clearQuizBtns];}