ios开发值json数据文件的存取

将Json存进本地文件夹

NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path=[paths objectAtIndex:0];
    NSString *Json_path=[path stringByAppendingPathComponent:@"JsonFile.json"];
    //==写入文件
    NSLog(@"%@",[JsonData writeToFile:Json_path atomically:YES] ? @"Succeed":@"Failed");

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读取Json

//==Json文件路径
    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path=[paths objectAtIndex:0];
    NSString *Json_path=[path stringByAppendingPathComponent:@"JsonFile.json"];
    //==Json数据
    NSData *data=[NSData dataWithContentsOfFile:Json_path];
    //==JsonObject

id JsonObject=[NSJSONSerialization JSONObjectWithData:data
                                                   options:NSJSONReadingAllowFragments
                                                     error:&error]

//nslog (@"%@",jsonobject);打印json字典