ios 无法保存plist

发布于 2024-12-03 13:31:57 字数 367 浏览 3 评论 0原文

我可以在模拟器中保存 plist 文件，但无法在设备中保存 plist 文件。任何建议。

我用来

NSString* dictPath = [[NSBundle mainBundle] pathForResource:@"Dictionary" ofType:@"plist"];
NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath];

读取文件

并

[dict writeToFile:dictPath atomically: YES];

写入文件。

原文

I m able to save the plist file in Simulator but I m not able to save the Plist file in the device. Any suggestion.

I m using

NSString* dictPath = [[NSBundle mainBundle] pathForResource:@"Dictionary" ofType:@"plist"];
NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath];

to read the files

and

[dict writeToFile:dictPath atomically: YES];

to write to file.

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谷夏 2024-12-10 13:31:58

通常，您可以根据文件将它们存储在 ~/Documents 或 ~/Library 中。问题什么是文档目录 (NSDocumentDirectory)？包括文档链接和您需要理解这一点的示例代码。

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街角迷惘 2024-12-10 13:31:58

您需要将plist保存在Documents目录中

才能写入

NSString *mainBundlePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *dictPath = [mainBundlePath stringByAppendingPathComponent:@"Dictionary"];
NSDictionary * dict = ...; //Construct your dictionary
[dict writeToFile:dictPath atomically: YES];

读取

NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath];

You need to save the plist in Documents directory

to write

NSString *mainBundlePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *dictPath = [mainBundlePath stringByAppendingPathComponent:@"Dictionary"];
NSDictionary * dict = ...; //Construct your dictionary
[dict writeToFile:dictPath atomically: YES];

to read

NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath];

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三寸金莲 2024-12-10 13:31:57

您无法写入主包。您只能从主包中读取。如果您想编写文件，则需要将其放入应用程序的文档目录中。

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

如果您需要主包中的 plist，您可以先将其复制到文档目录中，然后对其进行修改。建议进行检查以确保仅复制一次。

NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.plist",plistName]]; 

NSFileManager *fileManager = [NSFileManager defaultManager];

if (![fileManager fileExistsAtPath: path]){
    NSLog(@"File don't exists at path %@", path);

    NSString *plistPathBundle = [[NSBundle mainBundle] pathForResource:plistName ofType:@"plist"];

    [fileManager copyItemAtPath:plistPathBundle toPath: path error:&error]; 
}else{
    NSLog(@"File exists at path:%@", path);
}

You can not write in to main bundle. You only can read from main bundle. If you want to write an file you need to place it in to the documents directory of your app.

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

If you need the plist from the main bundle you can copy it first in to the documents directory then modify it. It is advised to have a check to ensure it is copied only once.

NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.plist",plistName]]; 

NSFileManager *fileManager = [NSFileManager defaultManager];

if (![fileManager fileExistsAtPath: path]){
    NSLog(@"File don't exists at path %@", path);

    NSString *plistPathBundle = [[NSBundle mainBundle] pathForResource:plistName ofType:@"plist"];

    [fileManager copyItemAtPath:plistPathBundle toPath: path error:&error]; 
}else{
    NSLog(@"File exists at path:%@", path);
}

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