Uploading a file to Google drive using iOS sdk - ios

Question

In my current application, I am trying to upload a .text file to google drive using Google SDK for iOS. But the issue is every time I got the error message in my Log as Insufficient Permission, so If anyone have faced this or have an idea on this type of error kindly help me.
Here is my code,
GTLDriveFile *file = [GTLDriveFile object];
file.descriptionProperty = #"Uploaded from the iOS app.";
file.mimeType = #"text/*";
file.name=#"MyTextFile";
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"myTestFile" ofType:#"txt"];
GTLUploadParameters *uploadParameters = [GTLUploadParameters uploadParametersWithFileURL:[NSURL URLWithString:filePath] MIMEType:file.mimeType];
GTLQueryDrive *query = [GTLQueryDrive queryForFilesCreateWithObject:file uploadParameters:uploadParameters];
[self.service executeQuery:query completionHandler:^(GTLServiceTicket *ticket, id object, NSError *error) {
if (error) {
NSLog(#"Error: %#", error);
}else{
}
}];
Log print when this action is performed,
unexpected response data (uploading to the wrong URL?)
{"error":{"code":403,"message":"Insufficient Permission","data":[{"domain":"global","reason":"insufficientPermissions","message":"Insufficient Permission"}]},"id":"gtl_3"}
Premature failure: upload-status:"final" location:(null)

Answer 1

I solve this problem
First Step
change your scope to [kGTLAuthScopeDriveFile]
but after first step, i got a same 403 error
because my APP in my phone have scope [kGTLAuthScopeDriveMetadataReadonly]
Second Step
reset my application or build in another simulator
I think first auth key chain using scope readonly was existed so doesn't write file to google drive
after change scope and re-auth then it works
if you change kKeychainItemName's value to another then could re-auth again with new scope
google says in Quickstart tutorial
// If modifying these scopes, delete your previously saved credentials by
// resetting the iOS simulator or uninstall the app.
// private let scopes = [kGTLAuthScopeDriveFile]