我需要从UIImageview中的URL加载动画Gif图像。
当我使用普通代码时,图像没有加载。
有没有其他方法加载动画Gif图像?
UIImageView* animatedImageView = [[UIImageView alloc] initWithFrame:self.view.bounds];
animatedImageView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:@"image1.gif"],
[UIImage imageNamed:@"image2.gif"],
[UIImage imageNamed:@"image3.gif"],
[UIImage imageNamed:@"image4.gif"], nil];
animatedImageView.animationDuration = 1.0f;
animatedImageView.animationRepeatCount = 0;
[animatedImageView startAnimating];
[self.view addSubview: animatedImageView];
您可以加载多个gif图像。
您可以使用以下ImageMagick命令拆分您的gif:
convert +adjoin loading.gif out%d.gif
SWIFT 3
这是需要Swift版本的人的更新!
几天前我需要做这样的事情。我根据特定的参数从服务器加载一些数据,同时我想显示一个不同的“加载”的gif图像。我正在寻找一个与UIImageView
一起做的选项但不幸的是我没有找到一些事情,没有拆分.gif图像。所以我决定使用UIWebView
实现一个解决方案,我想分享它:
extension UIView{
func animateWithGIF(name: String){
let htmlString: String = "<!DOCTYPE html><html><head><title></title></head>" +
"<body style=\"background-color: transparent;\">" +
"<img src=\""+name+"\" align=\"middle\" style=\"width:100%;height:100%;\">" +
"</body>" +
"</html>"
let path: NSString = Bundle.main.bundlePath as NSString
let baseURL: URL = URL(fileURLWithPath: path as String) // to load images just specifying its name without full path
let frame = CGRect(x: 0, y: 0, width: self.frame.width, height: self.frame.height)
let gifView = UIWebView(frame: frame)
gifView.isOpaque = false // The drawing system composites the view normally with other content.
gifView.backgroundColor = UIColor.clear
gifView.loadHTMLString(htmlString, baseURL: baseURL)
var s: [UIView] = self.subviews
for i in 0 ..< s.count {
if s[i].isKind(of: UIWebView.self) { s[i].removeFromSuperview() }
}
self.addSubview(gifView)
}
func animateWithGIF(url: String){
self.animateWithGIF(name: url)
}
}
我为UIView
做了一个扩展,它添加了一个UIWebView
作为子视图,并显示.gif图像只是通过它的名字。
现在在我的UIViewController
我有一个名为'loadingView'的UIView
,这是我的'loading'指标,每当我想显示.gif图像时,我做了类似这样的事情:
class ViewController: UIViewController {
@IBOutlet var loadingView: UIView!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
configureLoadingView(name: "loading.gif")
}
override func viewDidLoad() {
super.viewDidLoad()
// .... some code
// show "loading" image
showLoadingView()
}
func showLoadingView(){
loadingView.isHidden = false
}
func hideLoadingView(){
loadingView.isHidden = true
}
func configureLoadingView(name: String){
loadingView.animateWithGIF(name: "name")// change the image
}
}
当我想改变gif图像时,简单地用我的新.gif图像的名称调用函数configureLoadingView()
并调用showLoadingView()
,hideLoadingView()
正常一切正常!
但...
...如果您分割了图像,那么您可以使用名为UIImage
的UIImage.animatedImageNamed
静态方法在单行中对其进行动画处理,如下所示:
imageView.image = UIImage.animatedImageNamed("imageName", duration: 1.0)
来自文档:
此方法通过将一系列数字附加到name参数中提供的基本文件名来加载一系列文件。动画图像中包含的所有图像应共享相同的大小和比例。
或者您可以使用UIImage.animatedImageWithImages
方法制作它:
let images: [UIImage] = [UIImage(named: "imageName1")!,
UIImage(named: "imageName2")!,
...,
UIImage(named: "imageNameN")!]
imageView.image = UIImage.animatedImage(with: images, duration: 1.0)
来自文档:
从现有图像集创建并返回动画图像。动画图像中包含的所有图像应共享相同的大小和比例。
你可以使用https://github.com/Flipboard/FLAnimatedImage
#import "FLAnimatedImage.h"
NSData *dt=[NSData dataWithContentsOfFile:path];
imageView1 = [[FLAnimatedImageView alloc] init];
FLAnimatedImage *image1 = [FLAnimatedImage animatedImageWithGIFData:dt];
imageView1.animatedImage = image1;
imageView1.frame = CGRectMake(0, 5, 168, 80);
[self.view addSubview:imageView1];
斯威夫特3:
如上所述,我使用FLAnimatedImage和FLAnimatedImageView。我正在将gif作为xcassets的数据集加载。这允许我为iphone和ipad提供不同的GIF,用于外观和应用程序切片。这比我尝试的其他任何东西都要高效得多。使用.stopAnimating()也很容易暂停。
if let asset = NSDataAsset(name: "animation") {
let gifData = asset.data
let gif = FLAnimatedImage(animatedGIFData: gifData)
imageView.animatedImage = gif
}
这已经找到了接受的答案,但我最近遇到了UIImage+animatedGIF UIImage扩展。它提供以下类别:
+[UIImage animatedImageWithAnimatedGIFURL:(NSURL *)url]
允许您简单地:
#import "UIImage+animatedGIF.h"
UIImage* mygif = [UIImage animatedImageWithAnimatedGIFURL:[NSURL URLWithString:@"http://en.wikipedia.org/wiki/File:Rotating_earth_(large).gif"]];
像魔术一样工作。
这是使用Gif Image的最佳解决方案。在项目中从Github添加SDWebImage。
#import "UIImage+GIF.h"
_imageViewAnimatedGif.image= [UIImage sd_animatedGIFNamed:@"thumbnail"];
检查此链接
并导入这些clases UIImage + animatedGIF.h,UIImage + animatedGIF.m
使用此代码
NSURL *urlZif = [[NSBundle mainBundle] URLForResource:@"dots64" withExtension:@"gif"];
NSString *path=[[NSBundle mainBundle]pathForResource:@"bar180" ofType:@"gif"];
NSURL *url=[[NSURL alloc] initFileURLWithPath:path];
imageVw.image= [UIImage animatedImageWithAnimatedGIFURL:url];
希望这是有帮助的
如果您不想使用第三方库,
extension UIImageView {
func setGIFImage(name: String, repeatCount: Int = 0 ) {
DispatchQueue.global().async {
if let gif = UIImage.makeGIFFromCollection(name: name, repeatCount: repeatCount) {
DispatchQueue.main.async {
self.setImage(withGIF: gif)
self.startAnimating()
}
}
}
}
private func setImage(withGIF gif: GIF) {
animationImages = gif.images
animationDuration = gif.durationInSec
animationRepeatCount = gif.repeatCount
}
}
extension UIImage {
class func makeGIFFromCollection(name: String, repeatCount: Int = 0) -> GIF? {
guard let path = Bundle.main.path(forResource: name, ofType: "gif") else {
print("Cannot find a path from the file \"\(name)\"")
return nil
}
let url = URL(fileURLWithPath: path)
let data = try? Data(contentsOf: url)
guard let d = data else {
print("Cannot turn image named \"\(name)\" into data")
return nil
}
return makeGIFFromData(data: d, repeatCount: repeatCount)
}
class func makeGIFFromData(data: Data, repeatCount: Int = 0) -> GIF? {
guard let source = CGImageSourceCreateWithData(data as CFData, nil) else {
print("Source for the image does not exist")
return nil
}
let count = CGImageSourceGetCount(source)
var images = [UIImage]()
var duration = 0.0
for i in 0..<count {
if let cgImage = CGImageSourceCreateImageAtIndex(source, i, nil) {
let image = UIImage(cgImage: cgImage)
images.append(image)
let delaySeconds = UIImage.delayForImageAtIndex(Int(i),
source: source)
duration += delaySeconds
}
}
return GIF(images: images, durationInSec: duration, repeatCount: repeatCount)
}
class func delayForImageAtIndex(_ index: Int, source: CGImageSource!) -> Double {
var delay = 0.0
// Get dictionaries
let cfProperties = CGImageSourceCopyPropertiesAtIndex(source, index, nil)
let gifPropertiesPointer = UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 0)
if CFDictionaryGetValueIfPresent(cfProperties, Unmanaged.passUnretained(kCGImagePropertyGIFDictionary).toOpaque(), gifPropertiesPointer) == false {
return delay
}
let gifProperties:CFDictionary = unsafeBitCast(gifPropertiesPointer.pointee, to: CFDictionary.self)
// Get delay time
var delayObject: AnyObject = unsafeBitCast(
CFDictionaryGetValue(gifProperties,
Unmanaged.passUnretained(kCGImagePropertyGIFUnclampedDelayTime).toOpaque()),
to: AnyObject.self)
if delayObject.doubleValue == 0 {
delayObject = unsafeBitCast(CFDictionaryGetValue(gifProperties,
Unmanaged.passUnretained(kCGImagePropertyGIFDelayTime).toOpaque()), to: AnyObject.self)
}
delay = delayObject as? Double ?? 0
return delay
}
}
class GIF: NSObject {
let images: [UIImage]
let durationInSec: TimeInterval
let repeatCount: Int
init(images: [UIImage], durationInSec: TimeInterval, repeatCount: Int = 0) {
self.images = images
self.durationInSec = durationInSec
self.repeatCount = repeatCount
}
}
要用,
override func viewDidLoad() {
super.viewDidLoad()
imageView.setGIFImage(name: "gif_file_name")
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
imageView.stopAnimating()
}
确保在项目中添加gif文件,而不是在.xcassets文件夹中。
这不符合使用UIImageView的要求,但这可能会为您简化。你考虑过使用UIWebView吗?
NSString *gifUrl = @"http://gifs.com";
NSURL *url = [NSURL URLWithString: gifUrl];
[webView loadRequest: [NSURLRequest requestWithURL:url]
如果需要,您可以将HTML文件导入Xcode项目,并在字符串中设置根目录,而不是链接到需要Internet的URL。
这是一个有趣的图书馆:https://github.com/Flipboard/FLAnimatedImage
我测试了演示示例,它运行良好。它是UIImageView的孩子。所以我认为你也可以直接在你的故事板中使用它。
干杯
我知道答案已经获得批准,但很难不分享我已经创建了一个嵌入式框架,它为iOS添加了Gif支持,就像你使用任何其他UIKit Framework类一样。
这是一个例子:
UIGifImage *gif = [[UIGifImage alloc] initWithData:imageData];
anUiImageView.image = gif;
从https://github.com/ObjSal/UIGifImage/releases下载最新版本
- 威尔
如果必须从URL加载gif图像,则始终可以将gif嵌入到UIWebView
中的图像标记中。