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我有一个 Plist,其中有许多 Array。在这些数组中是我正在读取的不同对象,但是我在编辑数组中的这些对象然后再次将数组保存回 Plist 文件时遇到了困难。

我已经像这样阅读文件了......

Array = [myArrays objectAtIndex:arrayCounter]; //This tells it which Array to load.

myObject = [Array objectAtIndex:0]; //This reads that object in the array. (This is what I want to edit.)

我想知道如何编辑该对象(它是一个字符串),然后将其保存回数组中,然后将该数组保存回存储它的 Plist 文件中。

提前致谢!

PS - 如果需要,我愿意发布更多代码或信息。

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1 回答 1

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您不能将数据保存在应用程序的主包中,而是必须在文档目录中执行如下操作:

 NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *plistFilePath = [documentsDirectory stringByAppendingPathComponent:@"Data.plist"];

if([[NSFileManager defaultManager] fileExistsAtPAth:plistFilePath]) 
{//plist already exits in doc dir so save content in it

 NSMutableArray *data = [NSMutableArray arrayWithContentsOfFile:plistFilePath];
 NSArray *arrValue = [data objectAtIndex:arrayCounter];

 NSString *strValue = [arrValue objectAtIndex:0];
 strValue = [strValue stringByAppending:@"hello"]; //change your value here

 [[data objectAtIndex:arrayCounter] replaceObjectAtIndex:0 withObject:strValue]; //value replaced
 [data writeToFile:plistFilePath atomically:YES];
}
else{ //firstly take content from plist and then write file document directory. it will be executed only once

 NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"];
 NSMutableArray *data = [NSMutableArray arrayWithContentsOfFile:plistPath];
 NSArray *arrValue = [data objectAtIndex:arrayCounter];

 NSString *strValue = [arrValue objectAtIndex:0];
 strValue = [strValue stringByAppending:@"hello"]; //change your value here

 [[data objectAtIndex:arrayCounter] replaceObjectAtIndex:0 withObject:strValue]; //value replaced
 [data writeToFile:plistFilePath atomically:YES];

}
于 2012-09-18T12:54:32.763 回答