【代碼筆記】iOS-對數組進行排序

一，代碼。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //直接排序對象
    NSSortDescriptor *descriptor = [NSSortDescriptor sortDescriptorWithKey:nil ascending:YES];
    NSArray *descriptors = [NSArray arrayWithObject:descriptor];
    NSArray *myDataArray = [NSArray arrayWithObjects:@"what", @"xero", @"highligth", @"mountain", @"Victory", @"Balance", nil];
    NSLog(@"---myDataArray---%@",myDataArray);
    NSArray *resultArray = [myDataArray sortedArrayUsingDescriptors:descriptors];
    NSLog(@"%@", resultArray);
    
    
    //NSArray 使用sortedArrayUsingDescriptors，返回排序好的數組。
    //NSMutableArray可以直接使用sortUsingDescriptors，對數組本身排序。
    
}

二，輸出。

2015-10-23 11:56:45.178 對數組進行排序[6739:168615] (
    Balance,
    Victory,
    highligth,
    mountain,
    what,
    xero
)