未找到iOS文件？

Question

我與我的想法是在涉及我的兩個班，一個功能我的代碼的微小變化試驗：

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    AvsAViewController.currentSpec = [[SearchSpecs alloc]init]; 

    [sender setEnabled:NO]; 
} 

現在，構建失敗，我得到三個錯誤

1) Property 'currentSpec' not found on object of type 'AvsAViewController' 


2) Ld /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx normal i386 
    cd "/Users/timjones/Desktop/WMDG project/WMDGx" 
    setenv IPHONEOS_DEPLOYMENT_TARGET 7.0 
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -L/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator -F/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator -filelist /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/WMDGx.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=7.0 -framework QuartzCore -framework CoreData -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/WMDGx_dependency_info.dat -o /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx 

ld: file not found: /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 


3) GenerateDSYMFile /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app.dSYM /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx 
    cd "/Users/timjones/Desktop/WMDG project/WMDGx" 
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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/dsymutil /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx -o /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app.dSYM 

error: unable to open executable '/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx' 

儘管有投訴，但在'AvsAViewController'類型的對象上找到屬性currentSpec，並且導入了標頭IS。現在

，如果我註釋掉一行：

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
// AvsAViewController.currentSpec = [[SearchSpecs alloc]init]; 

    [sender setEnabled:NO]; 
} 

我得到兩個錯誤：

1) Ld /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx normal i386 
    cd "/Users/timjones/Desktop/Where'd My Day Go project/WMDGx" 
    setenv IPHONEOS_DEPLOYMENT_TARGET 7.0 
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -L/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator -F/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator -filelist /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/WMDGx.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=7.0 -framework QuartzCore -framework CoreData -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/WMDGx_dependency_info.dat -o /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx 

duplicate symbol _aVsAButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
duplicate symbol _cVsCButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
duplicate symbol _actVsAllButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
duplicate symbol _catVsAllButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
duplicate symbol _customDatePickerButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
duplicate symbol _goButton_tag in: 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o 
    /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ReportViewController.o 
ld: 6 duplicate symbols for architecture i386 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 


2) ld: 6 duplicate symbols for architecture i386 


clang: error: linker command failed with exit code 1 (use -v to see invocation) 


GenerateDSYMFile /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app.dSYM /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx 
    cd "/Users/timjones/Desktop/Where'd My Day Go project/WMDGx" 
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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/dsymutil /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx -o /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app.dSYM 

error: unable to open executable '/Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Products/Debug-iphonesimulator/WMDGx.app/WMDGx' 

我發現有這麼幾種類似的問題，但答案似乎全身是這個地方。我很痛苦地意識到我的調試技巧需要大量的開發，但是有人能給我一些關於這個問題的具體指導嗎？

謝謝！

Answer 1

當你想通，這個代碼的問題是：

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    AvsAViewController.currentSpec = [[SearchSpecs alloc]init]; 

    [sender setEnabled:NO]; 
} 

這是這一行：

AvsAViewController.currentSpec = [[SearchSpecs alloc]init]; 

你試圖設置一個類，屬性，當屬性只能設置在實例上。你需要的是UIStoryboardSegue上的destinationViewController財產。你可能想你的代碼看起來像這樣：

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    segue.destinationViewController.currentSpec = [[SearchSpecs alloc]init]; 

    [sender setEnabled:NO]; 
} 

如果Xcode的抱怨不被發現的屬性，您可能需要使用鑄造告訴編譯器閉嘴，因爲你知道你在做什麼：

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    [(AvsAViewController *)segue.destinationViewController setCurrentSpec:[[SearchSpecs alloc]init]]; 

    [sender setEnabled:NO]; 
} 

Answer 2

這是你的鏈接錯誤。

重複的符號_actVsAllButton_tag在： /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/AvsAViewController.o /Users/timjones/Library/Developer/Xcode/DerivedData/WMDGx-dixcfloqnhryzreowrpbowempliz/Build/Intermediates/WMDGx.build/Debug-iphonesimulator/WMDGx.build/Objects-normal/i386/ ReportViewController.o

只是讀它說什麼。

在AvsAViewController.m中有一個名稱爲_actVsAllButton_tag的符號，在ReportViewController.m中有一個名稱完全相同的符號。

加上六打其他副本。

以下是解決許多問題的提示：不要說「我去了這些錯誤，我不知道爲什麼」。對自己說「我的代碼有錯誤，它是哪個錯誤」？然後你看看錯誤信息並閱讀他們說的話。