使用NSSortDescriptor对NSDictionary对象的NSArray进行排序 [英] Sort NSArray of NSDictionary objects using NSSortDescriptor
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问题描述
我有一系列词典,其中包含有关高分的信息.我试图找出如何按照字典中的不同值对它们进行排序,但无法使其正常工作.
I have an array of dictionaries that contain information about high scores. I am trying to figure out how to sort them by the different values in the dictionaries but cannot get it to work.
下面显示的示例尝试按分数"进行排序:
An example shown below attempts to sort by "Score":
NSDictionary *highScoreDictionary1 = @{@"Score" : @52, @"Duration" : @230 , @"Date" : [NSDate date]};
NSDictionary *highScoreDictionary2 = @{@"Score" : @23, @"Duration" : @230 , @"Date" : [NSDate date]};
NSDictionary *highScoreDictionary3 = @{@"Score" : @35, @"Duration" : @230 , @"Date" : [NSDate date]};
NSArray *highScoresArray = @[highScoreDictionary1, highScoreDictionary2, highScoreDictionary3];
NSSortDescriptor *highScoreSortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"Score" ascending:YES]; // Sort by Score
NSArray *sortDescriptorArray = [NSArray arrayWithObject:highScoreSortDescriptor];
[highScoresArray sortedArrayUsingDescriptors:sortDescriptorArray];
我从NSLog(@"sorted array of dictionaries: %@", highScoresArray);
获得的输出是:
sorted array of dictionaries: (
{
Date = "2014-09-01 19:38:00 +0000";
Duration = 230;
Score = 52;
},
{
Date = "2014-09-01 19:38:00 +0000";
Duration = 230;
Score = 23;
},
{
Date = "2014-09-01 19:38:00 +0000";
Duration = 230;
Score = 35;
}
)
我该如何补救?我是否在这里遗漏了某些东西,因为似乎字典没有按分数排序?
How do I remedy this? Am I missing something here because it seems that the dictionaries are not being sorted by score.
推荐答案
highScoresArray = [highScoresArray sortedArrayUsingDescriptors:sortDescriptorArray];
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