我正在使用xcode6-beta5将touch id身份验证集成到我自己的应用程序中。使用以下代码在真实设备iphone5s（ios8-beta5）上运行。
已经导入。
LAContext *myContext = [[LAContext alloc] init];
NSError *authError = nil;
NSString *myLocalizedReasonString = @"use touch id to unlock app";
if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) {
[myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
localizedReason:myLocalizedReasonString
reply:^(BOOL success, NSError *error) {
if (success) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"success" message:@"pass auth" delegate:self cancelButtonTitle:NSLocalizedString(@"OK", @"OK button") otherButtonTitles:nil];
[alert show];
[alert release];
// User authenticated successfully, take appropriate action
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"fail" message:@"fail auth" delegate:self cancelButtonTitle:NSLocalizedString(@"OK", @"OK button") otherButtonTitles:nil];
[alert show];
[alert release];
// User did not authenticate successfully, look at error and take appropriate action
}
}];
} else {
// Could not evaluate policy; look at authError and present an appropriate message to user
}
但当我编译并运行时，它显示构建失败：
ld build/hwc.build/debug-iphoneos/hwc.build/objects-normal/armv7/hwc normal armv7
cd/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow
导出IPhoneOS_部署_目标=8.0
导出路径=“/applications/xcode6-beta5.app/contents/developer/platforms/iphoneos.platform/developer/usr/bin:/applications/xcode6-beta5.app/contents/developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin”
/applications/xcode6-beta5.app/contents/developer/toolchains/xcodedefault.xctolchain/usr/bin/clang-arch armv7-isysroot/applications/xcode6-beta5.app/contents/developer/platforms/iphoneos.platform/developer/sdks/iphoneos8.0.sdk-l/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/debug iphoneos-f/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/debug iphoneos-filelist/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/armv7/hwc.linkfilelist-xlinker-map-xlinker/用户/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/hwc-linkmap-normal-armv7.txt-dead-strip-all-iphone-load../../../pioneer/moclients/iphone/build/debug-iphoneos/libmo.a../../pioner/robie/device/iphone/datavault/build/debug-iphoneos/libdatavault.a…//..…/iFiels/AfARIA/LIBS/Debug iPoeOS/LIBAFAFARASL.A…/PoToSo/IOS/CODdoVIRB/Budio/Debug IpONeOS/LIBCORDOVA. A…//..…/TPoToo/iOS/clitUntul /库/调试iFieOS/LIBSucliclitUntul…A/////t/ToToo/iOS/clitUntul /库/调试iFieOS/LIBSupSuppiabase.A///TopOrth/LoBiTux/Labee/LoBie/Outs/WiGue/HWCclib/Bug／Debug IpONeOS/LIBHWC.A././/T/ToSoo/OpenSSL/iOS/Debug IpONeOS/LBICOTIO.A -FOBC链接运行时-MiFieOs版本MIN＝8 -LSTDC++.0.9-框架CordEnOffy-LZ.1.2.5-LSTDC++-框架核心图…-framework cfnetwork-framework foundation-framework mobilecoreservices-framework quartzcore-framework security-framework uikit-licucore.a-framework addressbook-framework coremedia-framework audiotoolbox-framework avfoundation-framework corelocation-framework addressbookui-frame-xlinker/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/armv7/hwc-u dependency-info.dat-o/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/armv7/hwc
体系结构ARMV7的未定义符号：
“_objc_class_$_lacontext”，引用自：
hwcapdelegate.o中的objc类引用
LD：未找到架构ARMV7的符号
错误：链接命令在退出代码1失败（使用-V以查看调用）
ld build/hwc.build/debug-iphoneos/hwc.build/objects-normal/arm64/hwc normal arm64
cd/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow
导出IPhoneOS_部署_目标=8.0
导出路径=“/applications/xcode6-beta5.app/contents/developer/platforms/iphoneos.platform/developer/usr/bin:/applications/xcode6-beta5.app/contents/developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin”
/applications/xcode6-beta5.app/contents/developer/toolchains/xcodedefault.xctolchain/usr/bin/clang-arch arm64-isysroot/applications/xcode6-beta5.app/contents/developer/platforms/iphoneos.platform/developer/sdks/iphoneos8.0.sdk-l/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/debug iphoneos-f/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/debug iphoneos-filelist/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/arm64/hwc.linkfilelist-xlinker-map-xlinker/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/hwc-linkmap-normal-arm64.txt-dead-strip-all-iphone-load../../../pioner/moclients/iphone/build/debug-iphoneos/libmo.a../../pioner/robie/device/iphone/datavault/build/debug-iphoneos/libdatavault.a…//..…/iFiels/AfARIA/LIBS/Debug iPoeOS/LIBAFAFARASL.A…/PoToSo/IOS/CODdoVIRB/Budio/Debug IpONeOS/LIBCORDOVA. A…//..…/TPoToo/iOS/clitUntul /库/调试iFieOS/LIBSucliclitUntul…A/////t/ToToo/iOS/clitUntul /库/调试iFieOS/LIBSupSuppiabase.A///TopOrth/LoBiTux/Labee/LoBie/Outs/WiGue/HWCclib/Bug／Debug IpONeOS/LIBHWC.A././/T/ToSoo/OpenSSL/iOS/Debug IpONeOS/LBICOTIO.A -FOBC链接运行时-MiFieOs版本MIN＝8 -LSTDC++.0.9-框架CordEnOffy-LZ.1.2.5-LSTDC++-框架核心图…-framework cfnetwork-framework foundation-framework mobilecoreservices-framework quartzcore-framework security-framework uikit-licucore.a-framework addressbook-framework coremedia-framework audiotoolbox-framework avfoundation-framework corelocation-framework addressbookui-frame-xlinker/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/arm64/hwc-u dependency-info.dat-o/users/i307466/downloads/onebridge/trunk/apps/iphone/workflow/build/hwc.build/debug-iphoneos/hwc.build/objects-normal/arm64/hwc
架构ARM64的未定义符号：
“_objc_class_$_lacontext”，引用自：
hwcapdelegate.o中的objc类引用
ld:找不到架构ARM64的符号
错误：链接命令在退出代码1失败（使用-V以查看调用）
最佳答案
似乎没有链接localauthentication.framework。将其添加到Xcode中的应用程序目标（General->Linked Frameworks and Libraries->+->localAuthentication.framework）。
关于objective-c - 在真实设备iPhone 5s上运行的Xcode 6-beta 5上的Touch ID构建错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25255257/