Access Flutter resource files on IOS

Official website description: Add resources and pictures - Flutter Chinese documentation - Flutter Chinese developer website - Flutter

On the iOS platform, assets resource files are read through  mainBundle  . Get the file path through  pathForResource:ofType:  's  lookupKeyForAsset or  lookupKeyForAsset:fromPackage: method. Similarly, FlutterViewController  's  lookupKeyForAsset: or  lookupKeyForAsset:fromPackage: method can also get the file path. It can be used when developing plug-ins  , and  it is the best choice  FlutterPluginRegistrarwhen developing applications using the platform view  .FlutterViewController

 Because we mainly develop applications, we useFlutterViewController测试。

access icons/heart.png的事例：

OC code: 

NSString* key = [registrar lookupKeyForAsset:@"icons/heart.png"];
NSString* path = [[NSBundle mainBundle] pathForResource:key ofType:nil];

Swift Code:

let key = controller.lookupKey(forAsset: "icons/heart.png")
let mainBundle = Bundle.main
let path = mainBundle.path(forResource: key, ofType: nil)

Access the assets/db.sqlite file on the flutter side on IOS

 //AppDelegate文件中
 let controller = window?.rootViewController as! FlutterViewController
 let key: String = controller.lookupKey(forAsset: "assets/db.sqlite");
 let mainBundle = Bundle.main
 let path = mainBundle.path(forResource: key, ofType: nil)
//"/Users/metajoy-release-1/Library/Developer/CoreSimulator/Devices/004A8A04-436C-43DB-AA34-2C460339FE10/data/Containers/Bundle/Application/07029261-FF77-4D68-A52E-B5D8D23837BA/Runner.app/Frameworks/App.framework/flutter_assets/assets/db.sqlite"