GIF只播放一次

[TonyXuChen]

能不能控制YYAnimatedImageView只播放一次某个GIF然后变为第一帧的图？

[CodeLife2012]

animatedImageLoopCount？

[dreampiggy]

you can also create an YYImage subclass to set that loopCount to 1 😄

[Desgard]

This is my extension for playing in special times.(in swift4)

extension YYImage {
    public var loopCount: UInt? {
        get {
            return objc_getAssociatedObject(self, &AssociatedObjectHandle) as? UInt
        }
        set {
            if newValue != nil {
                DispatchQueue.once(token: "YYImageCountSet", block: {
                    self.setSwizzlingMethod()
                })
            }
            objc_setAssociatedObject(self, &AssociatedObjectHandle, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
    
    public func setSwizzlingMethod() {
        let originalSelector = #selector(animatedImageLoopCount)
        let swizzledSelector = #selector(swizzled_animatedImageLoopCount)
        
        let originalMethod = class_getInstanceMethod(YYImage.self, originalSelector)
        let swizzledMethod = class_getInstanceMethod(YYImage.self, swizzledSelector)
        
        guard let original = originalMethod else { return }
        guard let swizzled = swizzledMethod else { return }
        
        if class_addMethod(YYImage.self, originalSelector, method_getImplementation(swizzled), method_getTypeEncoding(swizzled)) {
            class_replaceMethod(YYImage.self, swizzledSelector, method_getImplementation(original), method_getTypeEncoding(original))
        } else {
            method_exchangeImplementations(original, swizzled)
        }
    }
    
    @objc func swizzled_animatedImageLoopCount() -> UInt {
        guard let loop = loopCount else {
            return 0
        }
        return loop
    }
}