Unity调用原生(iOS, Android)方法

Unity调用原生程序方法，定义接口(doTestSelector)，写在Unity的C#代码中，在需要调用iOS或Android中的doTestSelector方法时，触发doTest() :

using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;

public class TestScript : MonoBehaviour {
// This tells unity to look up the function FooPluginFunction
// inside the static binary
[DllImport ("__Internal")]
private static extern float doTestSelector (string info);

void doTest () {
#if UNITY_ANDROID
using (AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
{
using( AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))
{
jo.Call("doTestSelector", "my info");
}
}
#endif

#if UNITY_IPHONE
doTestSelector("my info");
#endif
}

　　public void backToUnity () {
　　　　// Do somthing...
　　}

}

原生程序对doTestSelector接口的实现，例如iOS，实现写在Unity导出的Xcode项目UnityAppController.mm中:

因为需求限制，所以仍然以Objective-C开发，打开原生ViewController

extern "C" float doTestSelector(const char* info) {
YourViewController *vc = [[YourViewController alloc] initWithNibName:@"yourViewControllerName" bundle:nil];
[[UnityGetMainWindow() rootViewController] presentViewController:vc animated:YES completion:nil];

return 0.0f;
}

关闭原生程序，回到Unity，同样以iOS为例:

- (IBAction)OnClickBack:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
UnitySendMessage("TestScriptGameObject", [@"backToUnity" UTF8String], [@"" UTF8String]);
}