iOS Development error Log

Error tip: Fatal Error:file '/applications/xcode.app/contents/developer/platforms/iphonesimulator.platform/developer/ Sdks/iphonesimulator8.1.sdk/system/library/frameworks/uikit.framework/headers/uiwebview.h ' has been modified since The precompiled header '/users/rain/library/developer/xcode/deriveddata/modulecache/vau3zwn6t3kv/ UIKIT-2M4VYLEDI34V0.PCM ' was built

Note:please Rebuild precompiled Header '/users/rain/library/developer/xcode/deriveddata/modulecache/vau3zwn6t3kv/ UIKIT-2M4VYLEDI34V0.PCM '
1 Error generated.
Workaround: Remove the '/users/imac/library/developer/xcode/deriveddata/modulecache/1m29hznhw3i5b/' above tag UIKIT-2M4VYLEDI34V0.PCM file.
After deletion, it is possible to fatal error:could not build module ' UIKit ' Error prompt, by deleting/users/imac/library/developer/xcode/deriveddata/ Modulecache folder, recompile, run.
Note: the Library (library) under the imac is generally hidden, enter the terminal, enter the Chflags Nohidden ~/library/is OK.

Error Tip: Failed to instantiate the default view controller for Uimainstoryboardfile ' Main '-perhaps the designated entry point was not set?
Cause Analysis: No view controller in storyboard set the initial Scene.
Solution: In Storyboard, select a view Conroller as the first start-up interface for story board. If the navigation controller is the initial interface, then the navigation controller should be set as the initial boot interface, not the login interface.

error message: target specifies product type ' com. Apple.product-type.bundle.ui-testing ', but there ' s no such product type for the ' Iphonesimulator ' platform!
Solution: http://www.07net01.com/2015/09/930192.html

error Hint: ld:library not found for-lpods-afnetworking
clang:error:linker command failed with exit code 1 (use-v to see invocation)
Solution: The downloaded open source app uses the Cocoapods, to open with workspace instead of opening the Xcodeproj file directly.

error Hint: diff:/... /podfile.lock:no such file or directory
diff:/manifest.lock:no Such file or directory
The error:the Sandbox is a not -in-sync with the Podfile.lock. Run ' pod install ' or update your CocoaPods installation.
WORKAROUND: 1. Install the COCOAPODS;2. Import the project dependency framework with the pod Install command; 3. Open xcworkspace file (do not open with Xcproj file)
Installation dependent framework needs to be located in the directory where the project is located "cd/users/rain/documents/Open source/Open source App/greatreader-master" and execute "pod install" Command (This command will run the Podfile file contained in the project)

error Hint: Unable to add a source with URL ' https://github.com/CocoaPods/Specs.git ' named ' Master '
Workaround: sudo xcode-select-switch/applications/xcode.app/contents/developer, the following address can open the Xcode display package content, find the folder dragged into the terminal.

iOS Development error Log