Question

我尝试使用NSArray中的数据创建对象的NSArray。所以，我尝试自动复制下面的对象插入

这是起始位置

    candyArray = [NSArray arrayWithObjects:
                  [Candy candyOfCategory:@"chocolate" name:@"chocolate bar"],
                  [Candy candyOfCategory:@"chocolate" name:@"chocolate chip"],
                  [Candy candyOfCategory:@"chocolate" name:@"dark chocolate"],
                  [Candy candyOfCategory:@"hard" name:@"lollipop"],
                  [Candy candyOfCategory:@"hard" name:@"candy cane"],
                  [Candy candyOfCategory:@"hard" name:@"jaw breaker"],
                  [Candy candyOfCategory:@"other" name:@"caramel"],
                  [Candy candyOfCategory:@"other" name:@"sour chew"],
                  [Candy candyOfCategory:@"other" name:@"peanut butter cup"],
                  [Candy candyOfCategory:@"other" name:@"gummi bear"], nil];

这是我尝试自动化

NSArray *entries = [feed objectForKey:@"bookmarks"];

NSMutableArray *nameInsert;

for (NSDictionary *item in entries)
{
    [nameInsert addObject: [Candy candyOfCategory:@"chocolate" name:[item objectForKey:@"name"]]];
}

candyArray = nameInsert;

为什么nameInsert在条目的数据有两个输入时什么都不包含？

由于

Answer 1

您没有初始化nameInsert数组。

替换

NSMutableArray *nameInsert;

与

NSMutableArray *nameInsert = [NSMutableArray arrayWithCapacity:entries.count];

使用NSDictionary在NSArray中插入对象

1 个答案: