[NSURL 的解析和编码]

nsurl.m

//https://quxue-data.oss-cn-beijing.aliyuncs.com/scene_course/reading/baowei/reading12-3-73.json

                NSURL *url = [NSURL URLWithString:jsonUrl];
                NSLog(@"Scheme: %@", [url scheme]);//https
                NSLog(@"Host: %@", [url host]);//https
                NSLog(@"Port: %@", [url port]);//null
                NSLog(@"Path: %@", [url path]);//scene_course/reading/baowei/reading12-3-73.json
                NSLog(@"Relative path: %@", [url relativePath]);//scene_course/reading/baowei/reading12-3-73.json
                /*
                 Path components as array: (
                 "/",
                 "scene_course",
                 reading,
                 baowei,
                 "reading12-3-73.json"
                 )
                 */
                NSLog(@"Path components as array: %@", [url pathComponents]);
                NSLog(@"Parameter string: %@", [url parameterString]);//null
                NSLog(@"Query: %@", [url query]);//null
                NSLog(@"Fragment: %@", [url fragment]);//null