按键问题，代码编译没有语法问题，可是出现了这些！ 什么情况？

Building target “ViewandButton” of project “ViewandButton” with configuration “Debug” — (11 errors, 2 warnings)
    cd "/Volumes/disk0s2/Text code/ViewandButton"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.0 -x objective-c -arch i386 -fmessage-length=0 -pipe -std=c99 -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -D__IPHONE_OS_VERSION_MIN_REQUIRED=20000 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator2.0.sdk -fvisibility=hidden -mmacosx-version-min=10.5 -gdwarf-2 -iquote "/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/ViewandButton-generated-files.hmap" "-I/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/ViewandButton-own-target-headers.hmap" "-I/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/ViewandButton-all-target-headers.hmap" -iquote "/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/ViewandButton-project-headers.hmap" "-F/Volumes/disk0s2/Text code/ViewandButton/build/Debug-iphonesimulator" "-I/Volumes/disk0s2/Text code/ViewandButton/build/Debug-iphonesimulator/include" "-I/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/DerivedSources" -include /var/folders/r1/r1EopKPdGvugVPmFQb2fGk+++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/ViewandButton_Prefix-cuvzmfayouzcwohggmshlfxzgkgz/ViewandButton_Prefix.pch -c "/Volumes/disk0s2/Text code/ViewandButton/Classes/ViewandButtonAppDelegate.m" -o "/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/Objects-normal/i386/ViewandButtonAppDelegate.o"
/Volumes/disk0s2/Text code/ViewandButton/Classes/ViewandButtonAppDelegate.m:73: warning: property 'view2' requires method '-view2' to be defined - use @synthesize, @dynamic or provide a method implementation
/Volumes/disk0s2/Text code/ViewandButton/Classes/ViewandButtonAppDelegate.m:73: warning: property 'view2' requires the method 'setView2:' to be defined - use @synthesize, @dynamic or provide a method implementation
/Volumes/disk0s2/Text code/ViewandButton/Classes/ViewandButtonAppDelegate.m:73: warning: property 'view2' requires method '-view2' to be defined - use @synthesize, @dynamic or provide a method implementation
/Volumes/disk0s2/Text code/ViewandButton/Classes/ViewandButtonAppDelegate.m:73: warning: property 'view2' requires the method 'setView2:' to be defined - use @synthesize, @dynamic or provide a method implementation
    cd "/Volumes/disk0s2/Text code/ViewandButton"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.0 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator2.0.sdk "-L/Volumes/disk0s2/Text code/ViewandButton/build/Debug-iphonesimulator" "-F/Volumes/disk0s2/Text code/ViewandButton/build/Debug-iphonesimulator" -filelist "/Volumes/disk0s2/Text code/ViewandButton/build/ViewandButton.build/Debug-iphonesimulator/ViewandButton.build/Objects-normal/i386/ViewandButton.LinkFileList" -mmacosx-version-min=10.5 -framework Foundation -framework UIKit -framework CoreGraphics -o "/Volumes/disk0s2/Text code/ViewandButton/build/Debug-iphonesimulator/ViewandButton.app/ViewandButton"
Undefined symbols:
  "_kCAMediaTimingFunctionEaseInEaseOut", referenced from:
      _kCAMediaTimingFunctionEaseInEaseOut$non_lazy_ptr in TransitionView.o
  "_kCATransitionFromRight", referenced from:
      _kCATransitionFromRight$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionFade", referenced from:
      _kCATransitionFade$non_lazy_ptr in ViewandButtonAppDelegate.o
      _kCATransitionFade$non_lazy_ptr in TransitionView.o
  ".objc_class_name_CAMediaTimingFunction", referenced from:
      literal-pointer@__OBJC@__cls_refs@CAMediaTimingFunction in TransitionView.o
  "_kCATransitionFromBottom", referenced from:
      _kCATransitionFromBottom$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionMoveIn", referenced from:
      _kCATransitionMoveIn$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionFromLeft", referenced from:
      _kCATransitionFromLeft$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionPush", referenced from:
      _kCATransitionPush$non_lazy_ptr in ViewandButtonAppDelegate.o
  ".objc_class_name_CATransition", referenced from:
      literal-pointer@__OBJC@__cls_refs@CATransition in TransitionView.o
  "_kCATransitionFromTop", referenced from:
      _kCATransitionFromTop$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionReveal", referenced from:
      _kCATransitionReveal$non_lazy_ptr in ViewandButtonAppDelegate.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
  "_kCAMediaTimingFunctionEaseInEaseOut", referenced from:
      _kCAMediaTimingFunctionEaseInEaseOut$non_lazy_ptr in TransitionView.o
  "_kCATransitionFromRight", referenced from:
      _kCATransitionFromRight$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionFade", referenced from:
      _kCATransitionFade$non_lazy_ptr in ViewandButtonAppDelegate.o
      _kCATransitionFade$non_lazy_ptr in TransitionView.o
  ".objc_class_name_CAMediaTimingFunction", referenced from:
      literal-pointer@__OBJC@__cls_refs@CAMediaTimingFunction in TransitionView.o
  "_kCATransitionFromBottom", referenced from:
      _kCATransitionFromBottom$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionMoveIn", referenced from:
      _kCATransitionMoveIn$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionFromLeft", referenced from:
      _kCATransitionFromLeft$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionPush", referenced from:
      _kCATransitionPush$non_lazy_ptr in ViewandButtonAppDelegate.o
  ".objc_class_name_CATransition", referenced from:
      literal-pointer@__OBJC@__cls_refs@CATransition in TransitionView.o
  "_kCATransitionFromTop", referenced from:
      _kCATransitionFromTop$non_lazy_ptr in ViewandButtonAppDelegate.o
  "_kCATransitionReveal", referenced from:
      _kCATransitionReveal$non_lazy_ptr in ViewandButtonAppDelegate.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
Build failed (11 errors, 2 warnings)