Question

我有一组想要以幻灯片形式显示的图像。我可以在UIImageView上应用任何过渡效果。

  [imgView setImage:[UIImage imageNamed: @"images.jpeg"]];

Answer 1

是的，您可以在 UIImageView 上应用过渡效果。

首先，您需要导入 QuartzCore 框架。

#import <QuartzCore/QuartzCore.h>

然后您可以使用 CoreAnimation ，如下所示：

[imgView setImage:[UIImage imageNamed: @"images.jpeg"]];

CATransition *transition = [CATransition animation];
transition.duration = 1.0f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionFade;

[imgView.layer addAnimation:transition forKey:nil];

或者您可以简单地为 UIImageView 中的一组图像设置动画

imgView.animationImages = [NSArray arrayWithObjects:    
                               [UIImage imageNamed:@"image1.jpeg"],
                               [UIImage imageNamed:@"image2.jpeg"],
                               [UIImage imageNamed:@"image3.jpeg"],
                               [UIImage imageNamed:@"image4.jpeg"], nil];
imgView.animationDuration = 1.0f;
imgView.animationRepeatCount = 0;
[imgView startAnimating];

Answer 2

以下是如何创建幻灯片的示例代码。确保将一些图像导入到项目中，并在案例方法中将墙图像更改为图像名称。

 - (IBAction)start:(id)sender {

_button.hidden = YES;
[NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(photoCounter) userInfo:nil repeats:YES];


  }


  - (void)photoCounter {

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.90];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:NO];
[self updatePhoto];
[UIView commitAnimations];

}

- (void)updatePhoto 
{
switch (imageCount) 
{
    case 0:
        _images.image = [UIImage imageNamed:@"wall1.jpg"];
        break;
    case 1:
        _images.image = [UIImage imageNamed:@"wall2.jpg"];
        break;
    case 2:
        _images.image = [UIImage imageNamed:@"wall3.jpg"];
        break;
    case 3:
        _images.image = [UIImage imageNamed:@"wall4.jpg"];
        break;
    case 4:
        _images.image = [UIImage imageNamed:@"wall5.jpg"];
        break;

    default:
        break;
}
imageCount ++;
if (imageCount > 4)
    imageCount = 0;

 }

Answer 3

尝试使用以下代码：

 NSArray *imageNames = @[@"2_1014.png", @"2_1015.png", @"2_1016.png", @"2_1017.png",@"2_1018.png", @"2_1019.png", @"2_1020.png", @"2_1021.png",@"2_1022.png", @"2_1023.png", @"2_1024.png", @"2_1025.png",@"2_1026.png", @"2_1027.png", @"2_1028.png",
    @"2_1029.png",@"2_1030.png",@"2_1030.png",@"2_1029.png",
    @"2_1028.png",@"2_1027.png",@"2_1026.png",@"2_1025.png",
    @"2_1024.png",@"2_1023.png",@"2_1022.png",@"2_1021.png",
    @"2_1020.png",@"2_1019.png",@"2_1018.png",@"2_1017.png",
    @"2_1016.png",@"2_1015.png",@"2_1014.png"];


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

}

// Normal Animation
animationImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, [UIScreen mainScreen].bounds.size.height)];

animationImageView.animationImages = images;
animationImageView.animationRepeatCount=0;
animationImageView.animationDuration = 1;
[self.view addSubview:animationImageView];

[animationImageView startAnimating];

如何在UIImageView中制作过渡效果

3 个答案: