iOS如何对包含NSarray的NSNray的自定义对象的NSMutableArray进行排序？

Question

我有一个数组(NSMutableArray) ，其中包含StudentScoreObj，对象有missions (NSArray) 。

喜欢：

missions = @[@34, @43, @54, @23, @54]; 

需要使用任务数组的第一个对象对数组的StudentScoreObj进行排序。

我的代码：

@interface StudentScoreObj : NSObject

@property (nonatomic, copy) NSString *teamType;
@property (nonatomic, copy) NSString *teamNumber;
@property (nonatomic, copy) NSString *studentName;
@property (nonatomic, copy) NSString *isParticipated ;
@property (nonatomic, copy) NSString *totalScore;
@property (nonatomic, copy) NSString *avgScore;
@property (nonatomic, copy) NSArray *missions;

@end

Answer 1

您可以使用已sorted​Array​Using​Comparator 。

NSArray *sortArray = [array sortedArrayUsingComparator:^NSComparisonResult(StudentScoreObj *obj1,StudentScoreObj  *obj2) {

    NSNumber *obj1Score = @0, *obj2Score = @0;        
    if([[obj1 missions] firstObject]) {
        obj1Score = @([[[obj1 missions] firstObject] intValue]);
    }

    if([[obj2 missions] firstObject]) {
        obj2Score = @([[[obj2 missions] firstObject] intValue]);
    }
    return [obj1Score compare:obj2Score];
}];