Ios-oc-json parsing-Nsjsonserialization

1#import"ViewController.h"2 3 @interface Viewcontroller ()4 5 @end6 7 @implementation Viewcontroller8 9-(void) Touchesbegan: (Nsset<uitouch *> *) touches withevent: (Uievent *)EventTen { One [self test]; A } -  --(void) Jsontooc the { -     //1. Determine the URL -Nsurl *url = [Nsurl urlwithstring:@"Http://120.25.226.186:32812/login?username=123&pwd=456&type=JSON"]; -      +     //2. Create a Request object -Nsurlrequest *request =[Nsurlrequest Requestwithurl:url]; +      A     //3. Sending an asynchronous request at[Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse * _nullable response, NSData * _nullable data, Nserror *_nullable Connectionerror) { -         //data----> is essentially a JSON string -         //4. Parsing Data -         //NSLog (@ "%@", [[NSString Alloc]initwithdata:data encoding:nsutf8stringencoding]); -          -         //JSON--->oc object deserialization in         /* - first parameter: JSON binary data to a second parameter: + Third parameter: Error message -          */ the         /* * nsjsonreadingmutablecontainers = (1UL << 0), variable dictionary and array $ nsjsonreadingmutableleaves = (1UL << 1), all the strings inside are variable iOS7 and then the problem is not normallyPanax Notoginseng nsjsonreadingallowfragments = (1UL << 2) is neither a dictionary nor an array, you must use the enumeration value -          */ the          +NSString *STRM =@"\"wendingding\""; A          the         //nsdictionary *dict = [nsjsonserialization jsonobjectwithdata:data options:kniloptions Error:nil]; +          -ID obj =[nsjsonserialization jsonobjectwithdata:[strm datausingencoding:nsutf8stringencoding] Options: Nsjsonreadingallowfragments Error:nil]; $          $NSLog (@"%@---%@", [objclass],obj); -          -     }]; the  - }Wuyi  the //JSON--->oc --(void) Jsonwithoc Wu { -     //nsstring *STRM = @ "{\" error\ ": \" User name does not exist \ "}"; About     //nsstring *STRM = @ "[\" Error\ ", \" user name does not exist \ "]"; $     //nsstring *strm = @ "\" wendingding\ ""; -     //nsstring *STRM = @ "false"; -     //nsstring *STRM = @ "true"; -NSString *STRM =@"NULL"; A      +ID obj = [nsjsonserialization jsonobjectwithdata:[strm datausingencoding:nsutf8stringencoding] Options: Nsjsonreadingallowfragments Error:0]; theNSLog (@"%@---%@", [objclass],obj); -      $     /* the josn OC the      {}     @{} the      []     @[] the      ""     @"" - false NSNumber 0 in true NSNumber 1 the null nsnull is empty the      */ About      the     //Nil the[NSNullNULL];//the method obtains a single grain, which is represented as null, and can be used in a dictionary or an array the      + } -  the //OC--->jsonBayi-(void) Octojson the { theNsdictionary *DICTM = @{ -                             @"name":@"dasheng11", -                             @" Age":@3 the            }; the      theNsarray *arraym = @[@"123",@"456"]; the      -     //Note: Not all OC objects can be converted to JSON the     /* the -the outermost layer must be nsarray or nsdictionary the -All elements must be nsstring, NSNumber, Nsarray, nsdictionary, or NSNull94 -All keys in the dictionary must be of type nsstrings the -Nsnumbers can not die infinitely big the      */ theNSString *STRM =@"wenidngding";98      AboutBOOL IsValid =[Nsjsonserialization ISVALIDJSONOBJECT:STRM]; -     if(!isValid) {101NSLog (@"%zd", isValid);102         return;103     }104      the     //OC--->json106     /*107 first parameter: OC object to convert108 second parameter: option nsjsonwritingprettyprinted typography109      */ theNSData *data =[nsjsonserialization datawithjsonobject:strm options:nsjsonwritingprettyprinted Error:nil];111      theNSLog (@"%@", [[NSString Alloc]initwithdata:data encoding:nsutf8stringencoding]);113 } the  the-(void) Test the {117Nsarray *arraym = [Nsarray arraywithcontentsoffile:@"/users/xiaomage/desktop/Classroom sharing/11 Great God class information/05-multi-threaded network/0225/data/apps.plist"];118NSLog (@"%@", Arraym);119      -     //[Arraym writetofile:@ "/users/xiaomage/desktop/123.json" atomically:yes];121     122     //OC--->json123NSData *data = [nsjsonserialization datawithjsonobject:arraym options:nsjsonwritingprettyprinted Error:0];124[Data writetofile:@"/users/xiaomage/desktop/123.json"Atomically:yes]; the}

Ios-oc-json parsing-Nsjsonserialization