gitHub上又看到個很炫的動畫：https://github.com/MartinRGB/GiftCard-iOS

 

看了看他的代碼，發現核心動畫（就是把按鈕包裝成一個禮物盒）其實很簡單，就是把一個動畫的一幀一幀都截取下來放到一個數組里面，然后利用了UIImageView自帶的可以播放一個image的數組的方法。

簡化過的代碼大概是這樣子：

 

- (void)viewDidLoad {

    [super viewDidLoad];

 

    NSMutableArray *array = [NSMutableArray array];

    for (int i = 0; i < 40; i++) {
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat: @"gifbutton000%02d",i]];
        [array addObject:image];
    }
    self.giftImageArray = array;
    self.giftImageView.animationDuration = 1.0;
    self.giftImageView.animationImages = self.giftImageArray;
    self.giftImageView.animationRepeatCount = 1;
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleGiftImageViewTapped:)];
    [self.giftImageView addGestureRecognizer:tapGesture];
    self.giftImageView.userInteractionEnabled = YES;
    self.giftImageView.image = [self.giftImageArray firstObject];
   

}

 

- (void)handleGiftImageViewTapped:(UITapGestureRecognizer *)sender {
    [self.giftImageView startAnimating];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        UIImage *image =  [self.giftImageArray lastObject];
        self.giftImageView.image = image;
    });

}

效果如圖：