将JSON NString转换为NSDictionary

Question

我的json字符串是:

jsonData=@"{data:[{"type":"ex","coordinate":"19.0760,73.8777","title":"Awesome Event 1"},{"type":"pe","coordinate":"19.0760,73.2777","title":"Awesome Event 2"},{"type":"ev","coordinate":"19.0760,72.4777","title":"Awesome Event 3"},{"type":"ex","coordinate":"19.0760,72.3777","title":"Awesome Event 4"},{"type":"pe","coordinate":"19.0760,72.1777","title":"Awesome Event 5"},{"type":"ev","coordinate":"19.0760,72.4777","title":"Awesome Event 6"},{"type":"ex","coordinate":"19.0760,72.5777","title":"Awesome Event 7"},{"type":"pe","coordinate":"19.0760,72.9777","title":"Awesome Event 8"},{"type":"ev","coordinate":"19.1760,72.8777","title":"Awesome Event 9"},{"type":"ex","coordinate":"19.4760,72.8777","title":"Awesome Event 10"},{"type":"pe","coordinate":"19.5760,72.8777","title":"Awesome Event 11"},{"type":"ev","coordinate":"19.3760,72.8777","title":"Awesome Event 12"}]}";

如何转换为NSDictionary?

Answer 1

首先将jsonString转换为JsonData。根据你的代码json是字符串格式。所以请按照以下步骤操作。

->将jsonString转换为Data->将数据转换为JsonDict

jsonString to Data

NSData* data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

之后

数据到JsonDict

NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

然后您可以使用键名从字典中访问值。

Answer 2

使用NSJSONSerialization类和它的方法JSONObjectWithData可以将字符串转换为dict或json。

NSData *data = [yourString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
//                              OR
id json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"string: %@",json);