ios - Retrieve values from NSDictionary (which is stored in a NS Mutable Array) from another class

Question

i've stored colors in a dictionary which is added to a nsmutable array.i want to retrieve values of the dictionary from another class based on the keys.thanks in advance

-(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

您可以将该数组声明为全局数组，以便在其他类中使用该数组。

Answer 2

您可以只链接消息：

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

或在一行中相同：

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

Answer 3

看到这段代码，我不禁要问，你为什么要加成NSDictionary一个NSArray？你为什么不直接退货NSDictionary？

现在最简单的解决方案：

如果你想得到所有的NSDictionary（NSArray如果你有超过 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.
}

如果您只想获取某个索引处的字典：

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.

}