animation - 如何在 Swift 中将 gif 显示到 UIImageView 中？

Question

我想在 UIImageView 中使用 gif，但我不能。我的代码是:

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURL *url = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"gif"];
    UIImage *testImage = [UIImage animatedImageWithAnimatedGIFData:[NSData dataWithContentsOfURL:url]];
    self.dataImageView.animationImages = testImage.images;
    self.dataImageView.animationDuration = testImage.duration;
    self.dataImageView.animationRepeatCount = 1;
    self.dataImageView.image = testImage.images.lastObject;
    [self.dataImageView startAnimating];
}

swift :

var url : NSURL = NSBundle.mainBundle().URLForResource("MAES", withExtension: "gif")

在 objective-c 中我有 animatedImageWithAnimatedGIFData 但很快我不知道如何调用它或者如果不存在..

谢谢!

Answer 1

我假设您使用的是 https://github.com/mayoff/uiimage-from-animated-gif +UIImage animatedImageWithAnimatedGIFData: 源代码在 Objective-C 中。

您需要先将 Objective-C header 导入 Swift。 <强> Using Swift with Cocoa and Objective-C 解释了如何做到这一点:

To import a set of Objective-C files in the same framework target as your Swift code, you’ll need to import those files into the Objective-C umbrella header for the framework.

To import Objective-C code into Swift from the same framework

1. Under Build Settings, in Packaging, make sure the Defines Module setting for that framework target is set to Yes.

2. In your umbrella header file, import every Objective-C header you want to expose to Swift. For example:

   #import "UIImage+animatedGIF.h"

然后您可以按如下方式设置您的testImage:

var testImage = UIImage.animatedImageWithAnimatedGIFData(
    NSData.dataWithContentsOfURL(url))
self.dataImageView.animationImages = testImage.images
self.dataImageView.animationDuration = testImage.duration
self.dataImageView.animationRepeatCount = 1
self.dataImageView.image = testImage.images.lastObject
self.dataImageView.startAnimating()