对包含字符串格式的数字的NSMutableArray进行排序

Question

我在排序包含NS的NSStrings的NSMUtableArray时遇到一个小问题。 我这样排序

    scoreString=[NSString stringWithFormat:@"%lld",GameScore];
    [scorearr addObject:scoreString];
    NSSortDescriptor* sortOrder = [NSSortDescriptor sortDescriptorWithKey: @"self" ascending: NO];
    NSArray *scoreArray= [scorearr sortedArrayUsingDescriptors: [NSArray arrayWithObject: sortOrder]];
    scorearr =(NSMutableArray *)ary;

Answer 1

您正在使用可变数组，因此最好编写

NSSortDescriptor* sortOrder = [NSSortDescriptor sortDescriptorWithKey: @"self" ascending: NO];
[scorearr sortUsingDescriptors:[NSArray arrayWithObject: sortOrder]];

这样你就不会在排序时创建新的数组。

Answer 2

好的，我完成了这件事，

    NSNumber *inrank=[NSNumber numberWithInt:GameScore];
    scoreString=[NSString stringWithFormat:@"%lld",GameScore];
    [scorearr addObject:inrank];
    NSLog(@"%@",scorearr.description);
    //sorting array
    sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
    NSSortDescriptor* sortOrder = [NSSortDescriptor sortDescriptorWithKey: @"self" ascending: NO];
    NSArray *scoreArray= [scorearr sortedArrayUsingDescriptors: [NSArray arrayWithObject: sortOrder]];
    scorearr =(NSMutableArray *)scoreArray;
    NSLog(@"%@",scoreArray.description);