小编use*_*695的帖子

我在我的项目中替换了zBar SDK并遇到了问题.

ld: file is universal (3 slices) but does not contain a(n) armv7s slice: /Volumes/ZBarSDK/ZBarSDK/libzbar.a file '/Volumes/ZBarSDK/ZBarSDK/libzbar.a' for architecture armv7s
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我从http://nerdvision.net/app-development/ios/zbar-sdk下载了SDK

PS在模拟器中它工作.

我更新了我的应用程序以支持iOS 7,并且遇到了问题,在我的一个屏幕上我[context save];收到以下错误:

NSCocoaErrorDomain Code=133020 "The operation couldn’t be completed. (Cocoa error 133020.)" UserInfo=0x1115a6d0 {conflictList=(
"NSMergeConflict (0x1115a670) for NSManagedObject (0xf25c850) with objectID '0xf25c070 <x-coredata://76AF57C8-F7FF-4880-B06B-63F8B780C96D/Screen/p7>' with oldVersion = 5 and newVersion = 6 
and old object snapshot = {\n    index = 3;\n    message = \"<null>\";\n    status = 0;\n} and new cached row = {\n    index = 3;\n    message = \"<null>\";\n    status = 0;\n}"

在iOS6上不会出现此问题.

更新:managedObjectContext的代码

-(NSManagedObjectContext *)managedObjectContextForCurrentThread{
if ([NSThread isMainThread])
{
    NSManagedObjectContext *parentContext = self.mainManagedObjectContext.parentContext;
    [parentContext performBlockAndWait:^{
        NSMergePolicy *mergePolicy …