OC 冒泡法 比较法排序

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // 冒泡法
    NSMutableArray *arr = @[@"1",@"2344",@"4545",@"343335",@"1456",@"14",@"454",@"74",@"3945",@"1245"].mutableCopy;
    
    
    NSInteger length = arr.count;
    NSInteger repeatCount = 0;
    NSInteger swappedCount = 0;
    for (int i = 0, swapped = 1;  swapped == 1 && i < length - 1; i ++) {
         swapped = 0;
        for (int j = 0; j < length - i - 1; j ++) {
            repeatCount ++;
            if ([arr[j] integerValue] > [arr[j + 1] integerValue]) {
                NSString *tmp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = tmp;
                swapped = 1;
                swappedCount ++;
            }
        }
    }
    NSLog(@"1循环次数 %ld",repeatCount);
    NSLog(@"1交换次数 %ld", swappedCount);

    
    NSMutableArray *arr2 = @[@"1",@"2344",@"4545",@"343335",@"1456",@"14",@"454",@"74",@"3945",@"1245"].mutableCopy;
    // 选择法
    repeatCount = 0;
    swappedCount = 0;
    
    for (int i = 0; i < length - 1; i ++) {
        NSInteger index = i; // 核心 记录最小或者最大的坐标
        for (int j = i + 1; j < length; j ++) {
            repeatCount ++;
            if ([arr2[index] integerValue] > [arr2[j] integerValue]) {
                index = j;
            }
        }
        if (index != i) {
            swappedCount ++ ;
            NSString *tmp = arr2[i];
            arr2[i] = arr2[index];
            arr2[index] = tmp;
        }
    }
    NSLog(@"2循环次数 %ld",repeatCount);
    NSLog(@"2交换次数 %ld", swappedCount);
}