Add support for setting animation after init

[buba447]

#344

[willyantows]

@buba447 Can you give me an example code how to setting animation after init? (Swift version is better)
Thanks

[PizhuLoveCode]

@buba447 Now I create only one LOTAnimationView,then by config the LOTCompostion,can I animate A switch to animate B then return to animate A?

[willyantows]

@PizhuLoveCode Can you give sample code?

[PizhuLoveCode]

@Willyanto my code is a little stupid, if u find better way,please tell me.3q

//init
NSString *jsonPath = [[NSBundle mainBundle]pathForResource:@"chinese" ofType:@"json"];
NSData *jsonData = [[NSData alloc]initWithContentsOfFile:jsonPath];
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];

NSString *jsonPath2 = [[NSBundle mainBundle]pathForResource:@"us" ofType:@"json"];
NSData *jsonData2 = [[NSData alloc]initWithContentsOfFile:jsonPath2];
NSDictionary *dict2 = [NSJSONSerialization JSONObjectWithData:jsonData2 options:NSJSONReadingAllowFragments error:nil];


self.sceneModel1 = [[LOTComposition alloc] initWithJSON:dict withAssetBundle:[NSBundle mainBundle]];
self.sceneModel2 = [[LOTComposition alloc] initWithJSON:dict2 withAssetBundle:[NSBundle mainBundle]];

//play1:
self.lottieLogo = [[LOTAnimationView alloc] initWithModel:self.sceneModel1 inBundle:[NSBundle mainBundle]];
self.lottieLogo.contentMode = UIViewContentModeScaleAspectFill;
self.lottieLogo.loopAnimation = YES;
[self.lottieLogo play];

//swtich to play2

self.lottieLogo.sceneModel = _sceneModel2;
[self.lottieLogo play];
self.lottieLogo.loopAnimation = YES;

[willyantows]

@PizhuLoveCode wow thank you bro, it's work. I think it's pretty enough for now.

[1pocketaces1]

Hi is there any example of doing this with ng-lottie in angular?

[bitcloudTheFirst]

This seems like a great feature. Can anyone offer up an example in javascript? Thanks

[prufect]

Here is a small swift extension (with error handling) that you can drop in your code

extension LOTAnimationView {
    
    enum SetAnimationError: LocalizedError {
        case PathError(String)
        case JsonSerializationError(String)
        
        var errorDescription: String? {
        switch self {
            case .PathError(let message):
                return message
            case .JsonSerializationError(let message):
                return message
            }
        }
    }
    
    func setAnimation(to jsonFile: String, autoPlay: Bool = true, loop: Bool = false) throws {
        if let path = Bundle.main.path(forResource: jsonFile, ofType: "json") {
            do {
                let data = try Data(contentsOf: URL(fileURLWithPath: path), options: .mappedIfSafe)
                let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableLeaves)
                if let jsonResult = jsonResult as? Dictionary<String, AnyObject>{
                    if let sceneModel = LOTComposition(json: jsonResult, withAssetBundle: nil) {
                        self.sceneModel = sceneModel
                        if loop { self.loopAnimation = true }
                        if autoPlay { self.play() }
                    }
                }
            } catch {
                throw SetAnimationError.JsonSerializationError("Failed to convert your asset to a json dictionary")
            }
        } else {
            throw SetAnimationError.PathError("Could not find \(jsonFile) in your main bundle")
        }
    }
}

Example Usage:

do {
      try animView.setAnimation(to: "animName")
  } catch let error {
      print(error.localizedDescription)
 }