如何在plist中写入数据？ [英] How to write data in plist?

问题描述

我在资源文件夹中创建了save.plist。我直接写了一些数据（不使用编码）。我能够读取该数据，但我不能通过编码写入相同的save.plist。通过使用以下代码我试图写入数据，但它存储在我的.app plist。
代码在这里

I have created save.plist in resource folder. I have written some data within that directly (without using coding). I am able to read that data but I cant able write through coding into the same save.plist. By using following code I am trying to write the data but it get stored within my .app plist. The code is here

NSString *errorDesc = nil;

NSPropertyListFormat format;

NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"save" ofType:@"plist"];

NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:plistPath];

NSMutableDictionary *temp = (NSMutableDictionary *)[NSPropertyListSerialization
                     propertyListFromData:plistXML
                              mutabilityOption:NSPropertyListMutableContainersAndLeaves
                  format:&format errorDescription:&errorDesc];

if (!temp) {

    NSLog(errorDesc);

    [errorDesc release];        
    }
    //  [temp setValue:@"123" forKey:@"line1"];
    //  [temp writeToFile:plistPath atomically: YES];

    //Reading data from save.plist
    NSLog([temp objectForKey:@"name"]);
    NSLog([temp objectForKey:@"wish"]);
    NSNumber *num=[temp valueForKey:@"roll"];
    int i=[num intValue];
    printf("%d",i);
        //writitng the data in save.plist

    [temp setValue:@"green" forKey:@"color"];
    [temp writeToFile:plistPath atomically: NO];
    NSMutableDictionary *temp1 = (NSMutableDictionary *)[NSPropertyListSerialization
                propertyListFromData:plistXML                                                            
                                mutabilityOption:NSPropertyListMutableContainersAndLeaves
                format:&format errorDescription:&errorDesc];

    NSLog([temp objectForKey:@"color"]);

我想要的是，我想写的数据应该写入save.plist存储在引用中。我是这个概念的新。所以如果有人知道它，请帮助我。
提前感谢。
： - ）

I want that, the data which I want to write should get written into save.plist only which is stored in references. I am new with this concept. So if anyone knows it please help me. Thanks in advance. :-)

推荐答案

我不知道我是否明白你的问题，你的.app包中的.plist你可能做错了。如果您要存储偏好设置，则应考虑使用 NSUserDefaults 。

如果您真的要修改捆绑的.plist - 这里是一些代码：

I don't know if I understand your question, but if you want to write into a .plist within your .app bundle you are probably doing something wrong. If you want to store preferences, you should consider using NSUserDefaults.
If you really want to modify a bundled .plist - here is some code:

NSString* plistPath = nil;
NSFileManager* manager = [NSFileManager defaultManager];
if (plistPath = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"Contents/Info.plist"]) 
{
    if ([manager isWritableFileAtPath:plistPath]) 
    {
        NSMutableDictionary* infoDict = [NSMutableDictionary dictionaryWithContentsOfFile:plistPath];
        [infoDict setObject:[NSNumber numberWithBool:hidden] forKey:@"LSUIElement"];
        [infoDict writeToFile:plistPath atomically:NO];
        [manager changeFileAttributes:[NSDictionary dictionaryWithObject:[NSDate date] forKey:NSFileModificationDate] atPath: [[NSBundle mainBundle] bundlePath]];
    }
}

更新： >
Nate Flink指出，上面使用的一些NSFileManager方法已被弃用。
他发布了一个有以下替换方法的答案：
http://stackoverflow.com/a/12428472/ 100848

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