Objective c 解决Cocoa中的EXC\u坏访问问题？

嘿..我有下面的可可方法

-(void)startUploadWithContainerName:(NSString *)containerName
{
//Make an object of NSFileManager and Fetch an array of local folder contents and cloud folder contents
NSFileManager *uploadManager=[[NSFileManager alloc] init];
NSString *uploadPath=[[[NSString alloc] initWithString:@"~/Cloud Briefcase"] stringByExpandingTildeInPath];
NSError *err;
NSArray *uploadFolderContents=[uploadManager contentsOfDirectoryAtPath:uploadPath error:&err];
ASICloudFilesObjectRequest *cloudList = [ASICloudFilesObjectRequest listRequestWithContainer:containerName];
[cloudList startSynchronous];
NSArray *cloudFolderContents = [cloudList objects];

[cloudList release];
[uploadManager release];

NSLog(@"%lu",[uploadFolderContents count]);
NSLog(@"\n%@\n\n%@",cloudFolderContents,uploadFolderContents);
NSString *notFoundPath;
NSString *foundPath;
NSString *foundCloudMatch;
NSDate *cloudUploadDate;

for (int j=1; j<[uploadFolderContents count]; j++) {
    int i=0;
    for (int k=0; k<[cloudFolderContents count]; k++) {
        if ([[[cloudFolderContents objectAtIndex:k] name] isEqualToString:[uploadFolderContents objectAtIndex:j]]) {
            i=1;
            foundPath=[uploadFolderContents objectAtIndex:j];
            foundCloudMatch=[cloudFolderContents objectAtIndex:k];
            cloudUploadDate=[[cloudFolderContents objectAtIndex:k] lastModified];
            break;
        }
        else{
            i=0;
            notFoundPath=[uploadFolderContents objectAtIndex:j];
            continue;
        }
    }

    if (i==1) {
        NSLog(@"Found In Cloud: %@",foundPath);
        NSString *uploadPath=[[NSString stringWithFormat:@"~/Cloud Briefcase/%@",foundPath] stringByExpandingTildeInPath];
        NSTimeZone *tCST=[NSTimeZone timeZoneWithAbbreviation:@"CST"];
        NSInteger cloudDifference=[tCST secondsFromGMTForDate:cloudUploadDate];

        NSFileManager *typeManager=[[NSFileManager alloc] init];
        NSError *Er;
        NSDictionary *propertiesOfUploadFile=[typeManager attributesOfItemAtPath:uploadPath error:&Er];

        NSDate *localUploadDate=[propertiesOfUploadFile objectForKey:NSFileModificationDate];

        NSInteger sourceUploadDifference=[[NSTimeZone systemTimeZone] secondsFromGMTForDate:localUploadDate];


        NSLog(@"Local Date %@",localUploadDate);
        NSLog(@"Local Difference %ld",sourceUploadDifference);
        NSTimeInterval diff=sourceUploadDifference-cloudDifference;
        NSTimeInterval sDiff=sourceUploadDifference;
        NSDate *lDate=[[NSDate alloc] initWithTimeInterval:sDiff sinceDate:localUploadDate];
        NSDate *comparisonDate=[[NSDate alloc] initWithTimeInterval:diff sinceDate:cloudUploadDate];
        NSLog(@"\nSDiff Value %@",lDate);
        NSLog(@"Comparison Date %@",comparisonDate);

        [localUploadDate release];
        [propertiesOfUploadFile release];
        [typeManager release];
        [tCST release];

        if ([comparisonDate compare:lDate]==NSOrderedAscending) {
            [comparisonDate release];
            [lDate release];
            NSLog(@"Got It");
            NSString *escString=[foundPath stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
            ASICloudFilesObjectRequest *request = 
            [ASICloudFilesObjectRequest putObjectRequestWithContainer:containerName objectPath:escString contentType:@"file" file:uploadPath metadata:nil etag:nil];
            [request startSynchronous];
            NSLog(@"Uploaded %@",foundPath);
        }



    }
    else{
        NSLog(@"Not Found In Cloud: %@",notFoundPath);
        NSString *uploadPath=[[NSString stringWithFormat:@"~/Cloud Briefcase/%@",notFoundPath] stringByExpandingTildeInPath];
        //          NSLog(@"%@",uploadPath);


        NSString *escString=[notFoundPath stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
        NSLog(@"URL ENCODED VALUE: %@",escString);

        ASICloudFilesObjectRequest *request = 
        [ASICloudFilesObjectRequest putObjectRequestWithContainer:containerName objectPath:escString contentType:@"file" file:uploadPath metadata:nil etag:nil];
        [request startSynchronous];
        NSLog(@"Upload Complete");
    }
}
[uploadPath release];

[cloudList release];
[uploadFolderContents release];

 }

-（void）startUploadWithContainerName:（NSString*）containerName
{
//创建NSFileManager的对象并获取本地文件夹内容和云文件夹内容的数组
NSFileManager*uploadManager=[[NSFileManager alloc]init]；
NSString*uploadPath=[[NSString alloc]initWithString:@“~/Cloud公文包”]stringByExpandingTildeInPath]；
n错误*错误；
NSArray*uploadFolderContents=[uploadManager内容目录路径：uploadPath错误：&err]；
AsiCloudFileObjectRequest*cloudList=[AsiCloudFileObjectRequestListRequestWithContainer:containerName]；
[云列表启动同步]；
NSArray*cloudFolderContents=[cloudList对象]；
[云名单发布]；
[上传管理器发布]；
NSLog（@“%lu”，[uploadFolderContents count]）；
NSLog（@“\n%@\n\n%@”、cloudFolderContents、uploadFolderContents）；
NSString*notFoundPath；
NSString*foundPath；
NSString*foundCloudMatch；
NSDate*cloudUploadDate；
对于（int j=1；j，通常将环境变量NSZombieEnabled设置为YES，然后对问题进行故障排除。
在您的例子中，我看到您声明的指针没有指向任何危险的对象。在Clang Analyzer中运行代码会将其报告为警告。
将这些指针设置为nil。您已经声明了字符串指针，但在for循环中，如果“if”不为true，那么它将转到else，其中foundPath从未指向任何对象，并且您尝试在if（i==1）中访问它

更新：
也可以考虑Lou Franco的回答。他也是正确的。你不拥有CyrdListObjor。它是自动恢复的，并且通过将发布消息传递给CyrdListObj[CurrdList]版本，将其释放。
在您的情况下，当您释放它时，它可能不会立即崩溃，因为控制在同一个循环中。一旦当前线程自动释放池耗尽，您的代码将在EXC\u BAD\u访问时崩溃

ASICloudFilesObjectRequest *cloudList = [ASICloudFilesObjectRequest listRequestWithContainer:containerName];
[cloudList startSynchronous];
NSArray *cloudFolderContents = [cloudList objects];
[cloudList release];// Remove this line 

更新2:

NSString *uploadPath=[[[NSString alloc] initWithString:@"~/Cloud Briefcase"] stringByExpandingTildeInPath];

将上述内容更改为

NSString *uploadPath=[[NSString stringWithFormat:@"~/Cloud Briefcase"] stringByExpandingTildeInPath];

上面一行中的uploadPath仍然指向自动删除的对象。您正在泄漏您创建的字符串。调用release是错误的。因此删除[uploadPath release]和[cloudList release]您正在一次又一次地发布它。为什么要发布明显的自动删除对象uploadFolderContents？请从代码中删除以下三行：

[uploadPath release];

[cloudList release];
[uploadFolderContents release];

Update3:修复了版本问题。如果块更改为updatePath局部，则updatePath中的updatePath与方法范围内的updatePath变量冲突

-(void)startUploadWithContainerName:(NSString *)containerName
{
//Make an object of NSFileManager and Fetch an array of local folder contents and cloud folder contents
NSFileManager *uploadManager=[[NSFileManager alloc] init];
NSString *uploadPath=[[NSString stringWithFormat:@"~/Cloud Briefcase"] stringByExpandingTildeInPath];
NSError *err = nil;
NSArray *uploadFolderContents=[uploadManager contentsOfDirectoryAtPath:uploadPath error:&err];
ASICloudFilesObjectRequest *cloudList = [ASICloudFilesObjectRequest listRequestWithContainer:containerName];
[cloudList startSynchronous];
NSArray *cloudFolderContents = [cloudList objects];

[uploadManager release];

NSLog(@"%lu",[uploadFolderContents count]);
NSLog(@"\n%@\n\n%@",cloudFolderContents,uploadFolderContents);
NSString *notFoundPath = nil;
NSString *foundPath = nil;
NSString *foundCloudMatch = nil;
NSDate *cloudUploadDate = nil;

for (int j=1; j<[uploadFolderContents count]; j++) {
    int i=0;
    for (int k=0; k<[cloudFolderContents count]; k++) {
        if ([[[cloudFolderContents objectAtIndex:k] name] isEqualToString:[uploadFolderContents objectAtIndex:j]]) {
            i=1;
            foundPath=[uploadFolderContents objectAtIndex:j];
            foundCloudMatch=[cloudFolderContents objectAtIndex:k];
            cloudUploadDate=[[cloudFolderContents objectAtIndex:k] lastModified];
            break;
        }
        else{
            i=0;
            notFoundPath=[uploadFolderContents objectAtIndex:j];
            continue;
        }
    }

    if (i==1) {
        NSLog(@"Found In Cloud: %@",foundPath);
        NSString *uploadPathLocal=[[NSString stringWithFormat:@"~/Cloud Briefcase/%@",foundPath] stringByExpandingTildeInPath];
        NSTimeZone *tCST=[NSTimeZone timeZoneWithAbbreviation:@"CST"];
        NSInteger cloudDifference=[tCST secondsFromGMTForDate:cloudUploadDate];

        NSFileManager *typeManager=[[NSFileManager alloc] init];
        NSError *Er = nil;
        NSDictionary *propertiesOfUploadFile=[typeManager attributesOfItemAtPath:uploadPathLocal error:&Er];

        NSDate *localUploadDate=[propertiesOfUploadFile objectForKey:NSFileModificationDate];

        NSInteger sourceUploadDifference=[[NSTimeZone systemTimeZone] secondsFromGMTForDate:localUploadDate];


        NSLog(@"Local Date %@",localUploadDate);
        NSLog(@"Local Difference %ld",sourceUploadDifference);
        NSTimeInterval diff=sourceUploadDifference-cloudDifference;
        NSTimeInterval sDiff=sourceUploadDifference;
        NSDate *lDate=[[NSDate alloc] initWithTimeInterval:sDiff sinceDate:localUploadDate];
        NSDate *comparisonDate=[[NSDate alloc] initWithTimeInterval:diff sinceDate:cloudUploadDate];
        NSLog(@"\nSDiff Value %@",lDate);
        NSLog(@"Comparison Date %@",comparisonDate);

        [typeManager release];

        if ([comparisonDate compare:lDate]==NSOrderedAscending) {
            [comparisonDate release];
            [lDate release];
            NSLog(@"Got It");
            NSString *escString=[foundPath stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
            ASICloudFilesObjectRequest *request = 
            [ASICloudFilesObjectRequest putObjectRequestWithContainer:containerName objectPath:escString contentType:@"file" file:uploadPath metadata:nil etag:nil];
            [request startSynchronous];
            NSLog(@"Uploaded %@",foundPath);
        }
    }
    else{
        NSLog(@"Not Found In Cloud: %@",notFoundPath);
        NSString *uploadPathLocal=[[NSString stringWithFormat:@"~/Cloud Briefcase/%@",notFoundPath] stringByExpandingTildeInPath];
        //          NSLog(@"%@",uploadPath);


        NSString *escString=[notFoundPath stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
        NSLog(@"URL ENCODED VALUE: %@",escString);

        ASICloudFilesObjectRequest *request = 
        [ASICloudFilesObjectRequest putObjectRequestWithContainer:containerName objectPath:escString contentType:@"file" file:uploadPathLocal metadata:nil etag:nil];
        [request startSynchronous];
        NSLog(@"Upload Complete");
    }
 }
}

-（void）startUploadWithContainerName:（NSString*）containerName
{
//创建NSFileManager的对象并获取本地文件夹内容和云文件夹内容的数组
NSFileManager*uploadManager=[[NSFileManager alloc]init]；
NSString*uploadPath=[[NSString stringWithFormat:@“~/Cloud公文包”]stringByExpandingTildeInPath]；
n错误*err=nil；
NSArray*uploadFolderContents=[uploadManager内容目录路径：uploadPath错误：&err]；
AsiCloudFileObjectRequest*cloudList=[AsiCloudFileObjectRequestListRequestWithContainer:containerName]；
[云列表启动同步]；
NSArray*cloudFolderContents=[cloudList对象]；
[上传管理器发布]；
NSLog（@“%lu”，[uploadFolderContents count]）；
NSLog（@“\n%@\n\n%@”、cloudFolderContents、uploadFolderContents）；
NSString*notFoundPath=nil；
NSString*foundPath=nil；
NSString*foundCloudMatch=nil；
NSDate*cloudUploadDate=nil；
对于（int j=1；j这条线：

[cloudList release];

是可疑的，因为您没有分配或保留cloudList——它可能会作为自动释放返回，但请阅读ASICloudFilesObjectRequest的文档

即便如此，我也不认为这是你的问题——一旦它被过度夸大，以后就会引起问题

我看到很多版本看起来很糟糕，因为我没有看到相应的alloc或reserves。您需要阅读Objective-C的内存管理规则（或者转到自动引用计数）

我在这里记录了EXC_BAD_访问的调试技术：


简单的尝试：

运行构建和分析（修复所有问题）
打开僵尸
可能，只是可能“foundPath”未设置为有效值。有一个调试器，可能您应该使用它。
这可能是引用计数问题

要诊断：


运行静态分析器
修复所有静态分析器问题
试验

修复静态分析仪结果后仍有问题？无问题：


在仪器中，您可以启用僵尸检测并记录分配历史和参考计数
运行应用程序，执行重新设置问题所需的步骤
当发送僵尸消息时，工具将停止执行
然后找到发送消息的分配/对象，并逐步查看其生存期/引用计数历史记录

这使得查找已发布对象非常容易（例如，在某些情况下，从小时到分钟）。
否找到的路径设置为有效值..已在前面进行了验证..nd此外，，，当我注释该行时…相同的错误转移到下一行..Duh！！下一行还引用了“foundPath”.PYHOOYA！我最初在一个粗略的项目中运行了代码，并记录了foundPath的值，它显示了正确的值。此外，问题已经用上面接受的解决方案解决了。无论如何，谢谢。调试器是知识的交流。谢谢！它用该方法解决了异常。但它在main.m文件中导致了相同的异常#导入int main（int argc，char*argv[]）{返回NSApplicationMain（argc，（const char**）argv）；}返回NSAPPLA...…行似乎已经遇到了例外。@ TouthDistCurm请考虑重构您的代码。方法局部变量具有与本地变量相同的名称，如果是块或块。我们很难读取代码。您的应用程序与什么？ExcdBADiAccess发生冲突？如果在其上重新设置，则显示控制已在主方法中停止