出现此问题，最开始运行出现的是模拟器中找不到.a文件，

[simuty]

ld: warning: ignoring file /Users/51testing/Library/Developer/Xcode/DerivedData/VdiskSDKExample-abbicqymlddbkvddzxrsoztrjddn/Build/Products/Debug-iphonesimulator/libVdiskSDK-iOS.a, file was built for archive which is not the architecture being linked (i386): /Users/51testing/Library/Developer/Xcode/DerivedData/VdiskSDKExample-abbicqymlddbkvddzxrsoztrjddn/Build/Products/Debug-iphonesimulator/libVdiskSDK-iOS.a
Undefined symbols for architecture i386:
"OBJC_CLASS$_SinaWeibo", referenced from:
objc-class-ref in AppDelegate.o
"OBJC_CLASS$_VdiskComplexRequest", referenced from:
objc-class-ref in AppDelegate.o
"OBJC_CLASS$_VdiskComplexUpload", referenced from:
objc-class-ref in UploadBigFileViewController.o
"OBJC_CLASS$_VdiskRestClient", referenced from: