iOS --生产JSON格式，创建JSON文件，创建文件夹，指定储存

//生成json文件

- (void)onjson

{

//    如果数组或者字典中存储了  NSString, NSNumber, NSArray, NSDictionary, or NSNull 之外的其他对象,就不能直接保存成文件了.也不能序列化成 JSON 数据.

NSDictionary *dict = @{@"name" : @"me", @"do" : @"something", @"with" : @"her", @"address" : @"home"};

// 1.判断当前对象是否能够转换成JSON数据.

// YES if obj can be converted to JSON data, otherwise NO

BOOL isYes = [NSJSONSerialization isValidJSONObject:dict];

if (isYes) {

NSLog(@"可以转换");

/* JSON data for obj, or nil if an internal error occurs. The resulting data is a encoded in UTF-8.

*/

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:NULL];

/*

Writes the bytes in the receiver to the file specified by a given path.

YES if the operation succeeds, otherwise NO

*/

// 将JSON数据写成文件

// 文件添加后缀名: 告诉别人当前文件的类型.

// 注意: AFN是通过文件类型来确定数据类型的!如果不添加类型,有可能识别不了! 自己最好添加文件类型.

//        [jsonData writeToFile:@"/Users/xyios/Desktop/dict.json" atomically:YES];

//存入NSDocumentDirectory

NSString *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;

//创建文件夹

NSString *patientPhotoFolder = [path stringByAppendingPathComponent:@"abdd"];

NSFileManager *fileManager = [[NSFileManager alloc] init];

[fileManager createDirectoryAtPath:patientPhotoFolder

withIntermediateDirectories:NO

attributes:nil

error:nil];

//储存文件名称+格式

NSString *savePath = [patientPhotoFolder stringByAppendingPathComponent:@"Desopdict.json"];

NSLog(@"savePath is SY:%@",savePath);

[jsonData writeToFile:savePath atomically:YES];

NSLog(@"%@", [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]);

} else {

NSLog(@"JSON数据生成失败，请检查数据格式");

}

}