我正在尝试将此功能添加到我的项目中：
https://github.com/mobitar/MBAlertView
当我尝试在我的应用程序中使用它时，出现以下错误：
Ld /Users/florianschaal/Library/Developer/Xcode/DerivedData/Janssenapp-egfiwitwudiuhubsglmuhxxuafya/Build/Products/Debug-iphoneos/Janssenapp.app/Janssenapp normal armv7s cd /Users/florianschaal/Developer/Janssenapp setenv IPHONEOS_DEPLOYMENT_TARGET 6.1 setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Users/florianschaal/Library/Developer/Xcode/DerivedData/Janssenapp-egfiwitwudiuhubsglmuhxxuafya/Build/Products/Debug-iphoneos -L/Users/florianschaal/Developer/Janssenapp/Janssenapp/ZBarSDK -F/Users/florianschaal/Library/Developer/Xcode/DerivedData/Janssenapp-egfiwitwudiuhubsglmuhxxuafya/Build/Products/Debug-iphoneos -filelist /Users/florianschaal/Library/Developer/Xcode/DerivedData/Janssenapp-egfiwitwudiuhubsglmuhxxuafya/Build/Intermediates/Janssenapp.build/Debug-iphoneos/Janssenapp.build/Objects-normal/armv7s/Janssenapp.LinkFileList -dead_strip -fobjc-arc -fobjc-link-runtime -miphoneos-version-min=6.1 -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/florianschaal/Library/Developer/Xcode/DerivedData/Janssenapp-egfiwitwudiuhubsglmuhxxuafya/Build/Products/Debug-iphoneos/Janssenapp.app/Janssenapp Undefined symbols for architecture armv7s: "_OBJC_CLASS_$_CABasicAnimation", referenced from: objc-class-ref in MBSpinningCircle.o "_kCAMediaTimingFunctionEaseOut", referenced from: -[MBAlertView animationWithValues:times:duration:] in MBAlertView.o "_kCATransitionFade", referenced from: -[UIView(Animations) addFadingAnimationWithDuration:] in UIView+Animations.o "_kCAMediaTimingFunctionEaseInEaseOut", referenced from: -[UIView(Animations) animationPop] in UIView+Animations.o -[UIView(Animations) addPulsingAnimation] in UIView+Animations.o -[UIView(Animations) addFadingAnimationWithDuration:] in UIView+Animations.o "_kCATransitionFromBottom", referenced from: -[UIView(Animations) addFadingAnimationWithDuration:] in UIView+Animations.o "_OBJC_CLASS_$_CATransition", referenced from: objc-class-ref in UIView+Animations.o "_kCAMediaTimingFunctionEaseIn", referenced from: -[MBAlertView addDismissAnimation] in MBAlertView.o "_kCAFillModeForwards", referenced from: -[UIView(Animations) animationPop] in UIView+Animations.o -[UIView(Animations) addPulsingAnimation] in UIView+Animations.o -[MBAlertView animationWithValues:times:duration:] in MBAlertView.o "_OBJC_CLASS_$_CAMediaTimingFunction", referenced from: objc-class-ref in UIView+Animations.o objc-class-ref in MBAlertView.o "_OBJC_CLASS_$_CAKeyframeAnimation", referenced from: objc-class-ref in UIView+Animations.o objc-class-ref in MBAlertView.o "_CATransform3DMakeScale", referenced from: -[UIView(Animations) animationPop] in UIView+Animations.o -[UIView(Animations) addPulsingAnimation] in UIView+Animations.o -[MBAlertView addDismissAnimation] in MBAlertView.o -[MBAlertView addBounceAnimationToLayer:] in MBAlertView.o -[MBAlertView didSelectBodyLabel:] in MBAlertView.o -[MBAlertView didHighlightButton:] in MBAlertView.o ld: symbol(s) not found for architecture armv7s clang: error: linker command failed with exit code 1 (use -v to see invocation)