iphone – writeToFile原子地返回NO

概述我有以下代码： NSString *errorStr = nil;NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:dict format:NSPropertyListBinaryF 我有以下代码：

Nsstring *errorStr = nil;NSData *pListData = [nspropertyListSerialization dataFromPropertyList:dict                                                               format:nspropertyListBinaryFormat_v1_0                                                     errorDescription:&errorStr];if (errorStr) {    // Darn.    NSLog(@"saving dictionary error %@",errorStr);} else {    // [pListData writetofile:file atomically:YES];    // (ankit): Changing this to NO for speed.    success = [pListData writetofile:file atomically:NO];}

但是对于以下字典,它返回NO：

{    entrIEs = (                {            author = "Jada Wong";            cellIDentifIEr = default;            date = "2012-10-15 02:22:41 +0000";            domain = Readability;            FeedUrl = "readability://Feed";            imagesAreOnpulsesubscriber = 0;            order = 0;            summary = "";            templateUrl = "default_template.HTML";            Title = "We\U2019re Going To Try Out Dolce & Gabbana\U2019s Beauty Look This Weekend";            url = "http://www.styleite.com/media/styledish-10122012/";        }    );}

但它适用于以下dict：

{    entrIEs =     (                {            author = "Colleen Taylor";            cellIDentifIEr = default;            date = "2012-10-15 01:00:05 +0000";            domain = TechCrunch;            domainUrl = "http://techcrunch.com";            FeedUrl = "http:/asdasdm/TechCrunch";            images =             (                "http://asdshot-2012-10-14-at-5-20-43-pm.png"            );            imagesAreOnpulsesubscriber = 1;            lastUpdated = 1350263095;            order = 0;            shortlink = "http://bete.me/s/ej2Tg";            summary = "Bonobos,the men's clothing company,has gained lots of ground since it was founded in 2007 for its presence on the web as a mostly pure e-commerce p...";            templateUrl = "default_template.HTML";            Title = "InsIDe Bonobos\U2019 New Palo Alto Digs,Where The Startup KNown For E-Commerce Is Investing In Bricks & Mortar";            url = "http://techcrunch.com/2012/10/14/bonobos-palo-alto-mike-hart/";        }    );}

知道为什么吗？它适用于不同的字典
我写的文件路径是：

/var/mobile/Applications/4B60A704-BE00-4160-BFB4-AD89187FADD1/library/Caches/StoryCache/readability:  Feed

我得到的错误是：

"The operation Couldn\u2019t be completed. (Cocoa error 512.)" UserInfo=0xb41580 {NSfilePath=/var/mobile/Applications/4B60A704-BE00-4160-BFB4-AD89187FADD1/library/Caches/StoryCache/readability:  Feed,NSUnderlyingError=0xbb8930 "The operation Couldn\u2019t be completed. Is a directory"}

解决方法 使用writetofile：options：error：而不是writetofile：atomically：所以你可以记录错误代码.

NSError *error;success = [pListData writetofile:file options:0 error:&error];if (!success) {    NSLog(@"writetofile Failed with error %@",error);}

UPDATE

根据您粘贴到问题中的错误,我猜您已经有一个名为/ var / mobile / Applications / 4B60A704-BE00-4160-BFB4-AD89187FADD1 / library / Caches / StoryCache / readability：Feed的目录.您无法使用文件覆盖目录.您需要先重命名或删除目录.您可以使用 – [NSfileManager removeItemAtPath：error：]以递归方式删除目录及其所有内容.

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