SwiftでGIF画像を読み込む方法は？
アプリに配置する必要があるGIFバナーのURLを含む文字列があります。
私のコード：
func showAdd(){
Request.get("http://www.kyst.no/api/?apiMode=advertisement&lang=no", { (error: NSError?, data: NSData, text: NSString?) -> () in
let jsonResult: Dictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as Dictionary<String, AnyObject>
var banner : NSString = jsonResult["advertisement"]!["banner"] as NSString
self.addViewImage.image = UIImage.animatedImageNamed(banner, duration: 1)
})
}
しかし、何も起こりません。助けてください。
GIFイメージをロードSwift：
＃1：Swiftファイルを このリンク ：からコピーします
＃2：名前を使用してGIFイメージをロードする
let jeremyGif = UIImage.gifImageWithName("funny")
let imageView = UIImageView(image: jeremyGif)
imageView.frame = CGRect(x: 20.0, y: 50.0, width: self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView)
＃3：データを使用してGIF画像を読み込む
let imageData = try? Data(contentsOf: Bundle.main.url(forResource: "play", withExtension: "gif")!)
let advTimeGif = UIImage.gifImageWithData(imageData!)
let imageView2 = UIImageView(image: advTimeGif)
imageView2.frame = CGRect(x: 20.0, y: 220.0, width:
self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView2)
＃4：URLを使用してGIFイメージをロードする
let gifURL : String = "http://www.gifbin.com/bin/4802swswsw04.gif"
let imageURL = UIImage.gifImageWithURL(gifURL)
let imageView3 = UIImageView(image: imageURL)
imageView3.frame = CGRect(x: 20.0, y: 390.0, width: self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView3)
出力：
iPhone 8/iOS 11/xCode 9
//
// iOSDevCenters+GIF.Swift
// GIF-Swift
//
// Created by iOSDevCenters on 11/12/15.
// Copyright © 2016 iOSDevCenters. All rights reserved.
//
import UIKit
import ImageIO
extension UIImage {
public class func gifImageWithData(data: NSData) -> UIImage? {
guard let source = CGImageSourceCreateWithData(data, nil) else {
print("image doesn't exist")
return nil
}
return UIImage.animatedImageWithSource(source: source)
}
public class func gifImageWithURL(gifUrl:String) -> UIImage? {
guard let bundleURL = NSURL(string: gifUrl)
else {
print("image named \"\(gifUrl)\" doesn't exist")
return nil
}
guard let imageData = NSData(contentsOf: bundleURL as URL) else {
print("image named \"\(gifUrl)\" into NSData")
return nil
}
return gifImageWithData(data: imageData)
}
public class func gifImageWithName(name: String) -> UIImage? {
guard let bundleURL = Bundle.main
.url(forResource: name, withExtension: "gif") else {
print("SwiftGif: This image named \"\(name)\" does not exist")
return nil
}
guard let imageData = NSData(contentsOf: bundleURL) else {
print("SwiftGif: Cannot turn image named \"\(name)\" into NSData")
return nil
}
return gifImageWithData(data: imageData)
}
class func delayForImageAtIndex(index: Int, source: CGImageSource!) -> Double {
var delay = 0.1
let cfProperties = CGImageSourceCopyPropertiesAtIndex(source, index, nil)
let gifProperties: CFDictionary = unsafeBitCast(CFDictionaryGetValue(cfProperties, Unmanaged.passUnretained(kCGImagePropertyGIFDictionary).toOpaque()), to: CFDictionary.self)
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
if delay < 0.1 {
delay = 0.1
}
return delay
}
class func gcdForPair(a: Int?, _ b: Int?) -> Int {
var a = a
var b = b
if b == nil || a == nil {
if b != nil {
return b!
} else if a != nil {
return a!
} else {
return 0
}
}
if a! < b! {
let c = a!
a = b!
b = c
}
var rest: Int
while true {
rest = a! % b!
if rest == 0 {
return b!
} else {
a = b!
b = rest
}
}
}
class func gcdForArray(array: Array<Int>) -> Int {
if array.isEmpty {
return 1
}
var gcd = array[0]
for val in array {
gcd = UIImage.gcdForPair(a: val, gcd)
}
return gcd
}
class func animatedImageWithSource(source: CGImageSource) -> UIImage? {
let count = CGImageSourceGetCount(source)
var images = [CGImage]()
var delays = [Int]()
for i in 0..<count {
if let image = CGImageSourceCreateImageAtIndex(source, i, nil) {
images.append(image)
}
let delaySeconds = UIImage.delayForImageAtIndex(index: Int(i), source: source)
delays.append(Int(delaySeconds * 1000.0)) // Seconds to ms
}
let duration: Int = {
var sum = 0
for val: Int in delays {
sum += val
}
return sum
}()
let gcd = gcdForArray(array: delays)
var frames = [UIImage]()
var frame: UIImage
var frameCount: Int
for i in 0..<count {
frame = UIImage(cgImage: images[Int(i)])
frameCount = Int(delays[Int(i)] / gcd)
for _ in 0..<frameCount {
frames.append(frame)
}
}
let animation = UIImage.animatedImage(with: frames, duration: Double(duration) / 1000.0)
return animation
}
}
Swift 3用に更新されたファイルは次のとおりです。
最初にポッドをインストールします：-
pod 'SwiftGifOrigin'
クラスにインポートします
import SwiftGifOrigin
次に、viewDidiloadメソッドでこのコードを記述します
yourImageView.image = UIImage.gif(name: "imageName")
注：-GIFファイル名にファイル拡張子を含めないでください。例：-
//Don't Do this
yourImageView.image = UIImage.gif(name: "imageName.gif")
ソースを参照してください： https://github.com/swiftgif/SwiftGif
ローカルgif用のシンプルな拡張子。 gifからすべての画像を取得し、それをimageView animationImagesに追加します。
extension UIImageView {
static func fromGif(frame: CGRect, resourceName: String) -> UIImageView? {
guard let path = Bundle.main.path(forResource: resourceName, ofType: "gif") else {
print("Gif does not exist at that path")
return nil
}
let url = URL(fileURLWithPath: path)
guard let gifData = try? Data(contentsOf: url),
let source = CGImageSourceCreateWithData(gifData as CFData, nil) else { return nil }
var images = [UIImage]()
let imageCount = CGImageSourceGetCount(source)
for i in 0 ..< imageCount {
if let image = CGImageSourceCreateImageAtIndex(source, i, nil) {
images.append(UIImage(cgImage: image))
}
}
let gifImageView = UIImageView(frame: frame)
gifImageView.animationImages = images
return gifImageView
}
}
使用するには：
guard let confettiImageView = UIImageView.fromGif(frame: view.frame, resourceName: "confetti") else { return }
view.addSubview(confettiImageView)
confettiImageView.startAnimating()
UIImageView APIを使用した繰り返しおよび期間のカスタマイズ。
confettiImageView.animationDuration = 3
confettiImageView.animationRepeatCount = 1
これは私のために働いています
Podfile：
platform :ios, '9.0'
use_frameworks!
target '<Your Target Name>' do
pod 'SwiftGifOrigin', '~> 1.7.0'
end
使用法：
// An animated UIImage
let jeremyGif = UIImage.gif(name: "jeremy")
// A UIImageView with async loading
let imageView = UIImageView()
imageView.loadGif(name: "jeremy")
// A UIImageView with async loading from asset catalog(from iOS9)
let imageView = UIImageView()
imageView.loadGif(asset: "jeremy")
詳細については、次のリンクを参照してください。 https://github.com/swiftgif/SwiftGif