ios - ImageView循环动画

Question

我想在屏幕上创建 20 个不同的动画(图像的出现和消失)随着这些动画的不同重复次数。

我的一张图片代码

[UIView animateWithDuration:3.0f delay:0 options:UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat animations:^{

        _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(148, 0, 17, 18)];
        _imageVIew.image = [UIImage imageNamed:@"image.png»];
        [self.view addSubview: _imageView];
        [_star setAlpha:0];
        [_star setAlpha:1];

} completion:nil];

如果我使用此代码，设备会变热。如何降低设备的负载？

Answer 1

你想用这些图像创建动画的例子

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Load images
    NSArray *imageNames = @[@"win_1.png", @"win_2.png", @"win_3.png", @"win_4.png",
                        @"win_5.png", @"win_6.png", @"win_7.png", @"win_8.png",
                        @"win_9.png", @"win_10.png", @"win_11.png", @"win_12.png",
                        @"win_13.png", @"win_14.png", @"win_15.png", @"win_16.png"];

    NSMutableArray *images = [[NSMutableArray alloc] init];
    for (int i = 0; i < imageNames.count; i++) {
        [images addObject:[UIImage imageNamed:[imageNames objectAtIndex:i]]];
    }

    // Normal Animation
    UIImageView *animationImageView = [[UIImageView alloc] initWithFrame:CGRectMake(60, 95, 86, 193)];
    animationImageView.animationImages = images;
    animationImageView.animationDuration = 0.5;

    [self.view addSubview:animationImageView];
    [animationImageView startAnimating];
}

你可以在这里看到更多http://www.appcoda.com/ios-programming-animation-uiimageview/