iOS-12 Xcode-10 新版本 libstdc++6.0.9 找不到 换位置： //真机 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/ //模拟器 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/ //iOS12.0 /Ap