Question

我已经将颜色存储在字典中，该字典被添加到nsmutablearray.i想要根据keys.thanks提前从另一个类中检索字典的值

-(NSMutableArray *) GetAllColor 
{
    UIColor *aminocolor1 = [UIColor colorWithRed:.09 green:.56 blue:.30 alpha:.1];
    UIColor *aminocolor2 = [UIColor colorWithRed:1 green:1 blue:1 alpha:.1];

    NSDictionary *colordict = [NSDictionary dictionaryWithObjectsAndKeys:
                              aminocolor1, @"1",
                              aminocolor2, @"2",
                              nil];

    NSMutableArray *colors = [NSMutableArray arrayWithObjects:colordict, nil];
    return colors;
}

Answer 1

您可以将消息链接起来：

NSDictionary* colorDict = [colors objectAtIndex:0];
UIColor *aminocolor = [colorDict objectForKey:@"1"];

或者在一行中相同：

UIColor *aminocolor = [[colors objectAtIndex:0] objectForKey:@"1"];

Answer 2

看到这段代码，我不得不问，为什么要将NSDictionary添加到NSArray？你为什么不回归NSDictionary？

现在最简单的解决方案：

如果您想从NSDictionary获取所有NSArray（如果您有超过1个）

for(NSDictionary *dict in colors) {
   //do whatever you want with the dictionary (now it's the dict that has the collors)
   [dict objectForKey:@"1"] // this is how you get animcolor1.
}

如果你想获得某个索引的字典：

if([colors count] > 0 && [colors count] < yourIndex) { //be smart and perform validations ;)
     NSDictionary *dict =  [colors objectAtIndex:yourIndex];
    //do whatever you want with the dictionary (now it's the dict that has the collors)
    [dict objectForKey:@"1"] // this is how you get animcolor1.

}

Answer 3

您可以将该数组声明为全局，以便在其他类中使用该数组。

从另一个类中检索NSDictionary（存储在NS Mutable Array中）的值

3 个答案: