从Plist存储和检索 [英] Storing and Retrieving from a Plist

问题描述

可能重复：

iOS：将两个NSMutableArray存储在.plist文件中

我一直不使用plists，因为我不知道如何使用plist。

I've always refrained from using plists as I'm not really sure how to use one.

任何人都可以给一个简单的使用plist的代码示例？我有兴趣将一个 NSArray 或 NSDictionary 保存到plist，然后再次检索它。

Could anyone give a simple code example of using a plist? I'm interested in saving an NSArray or NSDictionary to a plist and then retrieving it again later.

存储 NSArray 或 NSDictionary ？

推荐答案

您可以存储以下数据类型作为值：

You can store the following data types in a .plist file as value:

• NSArray


• NSMutableArray


• NSDictionary


• NSMutableDictionary


• NSData


• NSMutableData


• NSString


• NSMutableString


• NSNumber


• NSDate

• NSArray
• NSMutableArray
• NSDictionary
• NSMutableDictionary
• NSData
• NSMutableData
• NSString
• NSMutableString
• NSNumber
• NSDate

使用NSDictionary，您可以将由某些键值对组成的关联数组存储在plist中。

With an NSDictionary you can store in a plist an associative array composed by some key-value pair. Use the NSArray if you only want to save a data series.

要在plist文件中保存上面的对象，只需写下：

To save one of the object above on a plist file simply write:

- (NSString *)dataFilePath {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(
    NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:@"yourFileNameHere"];
}

 //Write to the plist

 [myArray writeToFile:[self dataFilePath] atomically:YES];

 //Read from the plist

 if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
     NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath];
 }

这篇关于从Plist存储和检索的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！