You added too much code. JNI is Android specific. You shouldn’t have any JNI related file on iOS.
You need to remove JniHelper from Xcode. My guess is you included proj.android or other Android specific code in Xcode, which is not supposed to be there.
Note: JNI stands for Java Native Interface. There is no Java on iOS.
First JNI as previously mentioned [Fradow] is Android specific, if you have any file with this import meaning you need delete reference for IOS project.
Second:
<ShareSDK/ShareSDK.h> file not found.
For some problem in XCODE ide not update reference for SDK ShareSDK. To solve this , i remove the SDK folder and import again. I don´t understand complete process but with this workaround i solve my problem.