竖直显示字符串UILabel

//怎么将字符串中的每一个字符存入数组中

NSString *[email protected]"中华人民共和国";
    NSMutableArray *stringArray = [[NSMutableArray alloc] init];
    for (int i = 0; i < textString.length; i ++) {
        NSRange range;
        range.location = i;
        range.length = 1;
        NSString *tempString = [textString substringWithRange:range];
        [stringArray addObject:tempString];
    }

//竖直显示字符串
    NSString *amutstr=[stringArray componentsJoinedByString:@"\n"];
    self.StoryTitleLabel.text=amutstr;
    self.StoryTitleLabel.numberOfLines=textString.length;

下面效果：