iOS NSMutableString 返回奇怪的字符

Question

我制作了一个包含几个单词的数组，然后我将所有单词放入一个可变字符串中，然后将这个字符串的每个字符放入一个可变数组中。然而，“wordSplitted”是一个可变的字符数组，在模拟器中每次启动应用程序时都会给出随机乱序字符，显示在日志中:

2012-07-22 09:12:01.108 xxx[4484:b603] wordSplitted contains: (
    "",
    "",
    "\U221e",
    "-",
    G,
    N,
    P,
    "",
    ""
)

应该是b, i, l, h, u, k, s, k, j。

   NSArray *threeWords = [NSArray arrayWithObjects:@"bil", @"huk", @"skje", nil];


    NSMutableString *allTogether = [[NSMutableString alloc]init];

    /*
    for (NSString *s in threeWords)
    {
        [allTogether appendString:s];
    }
     */

    for (int b = 0; b < [threeWords count]; b++)
    {
        [allTogether appendString:[threeWords objectAtIndex:b]];
    }
    NSLog (@"allTogether contains %@", allTogether);

    //[threeWords release];
    [allTogether release];

    NSMutableArray *wordSplitted = [[NSMutableArray alloc]init];

//this function gives me headache
        for (int a = 0; a < 9; a ++)
        {
            //gives also scrambled characters

        //[wordSplitted addObject:[NSString stringWithFormat:@"%C",[allTogether characterAtIndex:a]]];

        NSRange range = {a,1};

        [wordSplitted addObject:[allTogether substringWithRange:range]];

    }

    NSLog (@"wordSplitted contains: %@", wordSplitted);

如何显示字母等普通字符？

Answer 1

您调用了 [allTogether release] 但随后又引用了它。通常这会导致您的程序崩溃，但有关 CFMutableArray 支持的一些东西使得这种情况并不总是发生。

基本上，在确定使用完毕之前不要释放数组。