iostream not found in Xcode

问题:

I have problem including ZXing in my App. I get error: "iostream file not found". I have done everything like in ZXing instruction but i can't get this working. I'm including this in .mm file. I use story boards this project is for iOS 6.0 This is error i get:

In file included from /Users/adam/Developer/project/project/SecondViewController.mm:11: In file included from zxing/iphone/ZXingWidget/Classes/QRCodeReader.h:10: In file included from zxing/iphone/ZXingWidget/Classes/FormatReader.h:22: zxing/cpp/core/src/zxing/common/Counted.h:23:10: fatal error: 'iostream' file not found

Any idea what can i do to get this working?

EDIT:

When i select Compile Source File As Objcetive-C++ project comiples without issues, BUT as i was told this is not god soultion beacuse this can make some problems later on with other parts of app.

回答1:

Just rename your implementation file with .mm extension instead of .m solve the issue.

回答2:

Project -> Build Settings -> Apple LLVM compiler 4.1-Language -> C++ Standard Library

Make sure to set that to "libstdc++"

回答3:

Try to create a new project, and choose "command line tool" as the template for your project. Choose C++. Paste your code into the new project (it should be a .cpp file). When you run the program, it should be able to include iostream without any problems.

回答4:

placing #import "QRCodeReader.h" in the mm-file instead of it's header-file fixed the issue for me

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