如何从本地JSON文件将数据加载到ViewController中

I'm developing an iPhone app and I need to show stored data in a TableView. After some research I decided that JSON would be best fit for storing the data. However, I couldn't find any tutorials explaining how to read JSON as a local file rather than from a remote source, as often is the case.

我正在开发一个iPhone应用程序，我需要在TableView中显示存储的数据。经过一些研究后，我认为JSON最适合存储数据。但是，我找不到任何教程解释如何将JSON作为本地文件而不是从远程源读取，通常就是这种情况。

Any tutorials you could recommend?

您可以推荐的任何教程？

2 个解决方案

#1

You can use NSJSONSerialization for this.

您可以使用NSJSONSerialization。

NSError *deserializingError;
NSURL *localFileURL = [NSURL fileURLWithPath:pathStringToLocalFile];
NSData *contentOfLocalFile = [NSData dataWithContentsOfURL:localFileURL];
id object = [NSJSONSerialization JSONObjectWithData:contentOfLocalFile 
                                            options:opts 
                                              error:&deserializingError];

#2

First of all: you need to load your local json string. Assuming the jsonstring is inside your project, to load it, first create nsstring pointing to the file:

首先：你需要加载你的本地json字符串。假设jsonstring在你的项目中，要加载它，首先创建指向该文件的nsstring：

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"THENAMEOFTHEFILE" ofType:@"EXTENSIONOFYOUTFILE"];

second, load the data of file:

二，加载文件数据：

NSData *content = [[NSData alloc] initWithContentsOfFile:filePath];

third, parse the data:

第三，解析数据：

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:content options:kNilOptions error:nil];

#1