从 NSString 中的 PLIST 创建字典

发布于 2024-10-19 16:03:15 字数 851 浏览 5 评论 0原文

因此，我编写了这个方便的方法来解决从属性列表创建 NSDictionary 不像从文件/Web 资源创建 NSDictionary 那样容易的问题。虽然我可以使用 NSXMLParser 解析它，或者更改服务器发送数据（json 等）的方式，但这不是我目前关心的问题，而是我关心的是这种方法无疑很慢并且由于我不使用 rand() 来确定 .plist 的文件名，因此容易发生冲突。

那么，有可能让它更快吗？我需要确保该文件在应用程序删除之间不存在，因此使用 /tmp。

+ (NSDictionary *)dictionaryFromPropertyListString:(NSString *)stringToParse
{
    NSLog(@"dictionaryFromPropertyListString: %@", stringToParse);

    NSString *newFilePath = [NSTemporaryDirectory() stringByAppendingString:@"/Stuff.plist"];

    [stringToParse writeToFile:newFilePath atomically:YES encoding:NSASCIIStringEncoding error:nil];

    NSDictionary *dictionaryToReturn = [NSDictionary dictionaryWithContentsOfFile:newFilePath];

    NSLog(@"returned dictionary: %@", [dictionaryToReturn descriptionInStringsFileFormat]);

    return dictionaryToReturn;
}

原文

So, I've written this convenience method as a solution to the problem where creating an NSDictionary from a Property List isn't as easy as from a file/web resource. While I could parse this using NSXMLParser, or change the way my server sends data (json, whatever), that isn't my concern at the moment, rather my concern is that this method is undeniably slow and prone to collision since I don't use rand() to determine the .plist's file name.

So, is it possible to make this faster? I need to ensure that the file doesn't subsist between deletions of the app, hence the use of /tmp.

+ (NSDictionary *)dictionaryFromPropertyListString:(NSString *)stringToParse
{
    NSLog(@"dictionaryFromPropertyListString: %@", stringToParse);

    NSString *newFilePath = [NSTemporaryDirectory() stringByAppendingString:@"/Stuff.plist"];

    [stringToParse writeToFile:newFilePath atomically:YES encoding:NSASCIIStringEncoding error:nil];

    NSDictionary *dictionaryToReturn = [NSDictionary dictionaryWithContentsOfFile:newFilePath];

    NSLog(@"returned dictionary: %@", [dictionaryToReturn descriptionInStringsFileFormat]);

    return dictionaryToReturn;
}

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纵山崖 2024-10-26 16:03:15

NSString *error;
NSPropertyListFormat format;
NSDictionary* plist = [NSPropertyListSerialization propertyListFromData: [yourString dataUsingEncoding:NSUTF8StringEncoding] mutabilityOption: NSPropertyListImmutable format: &format errorDescription:&error];

NSString *error;
NSPropertyListFormat format;
NSDictionary* plist = [NSPropertyListSerialization propertyListFromData: [yourString dataUsingEncoding:NSUTF8StringEncoding] mutabilityOption: NSPropertyListImmutable format: &format errorDescription:&error];

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