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| //
// ViewController.m
// JsonTest_NSJSONSerialization
//
// Created by lv wei on 13-4-23.
// Copyright (c) 2013年 lv wei. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
//NSJSONSerialization (10_7, 5_0)
if (version >=5.0) {
[self jsonParse];
[self jsonBuild];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)jsonParse
{
NSString* jsonString = @"{\"info\":{\"error\":0,\"type\":34},\"poilist\":[{\"name\":\"银科大厦\",\"x\":116.345,\"y\":39.3334},{\"name\":\"中国技术交易大厦\",\"x\":116.3451,\"y\":39.31334}]}";
NSData* jsonData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString lengthOfBytesUsingEncoding:NSUTF8StringEncoding]];
NSLog(@"-----NSJSONSerialization-----开始解析");
__autoreleasing NSError* error = nil;
id root = [NSJSONSerialization JSONObjectWithData:jsonData
options:kNilOptions error:&error];
if (error) {
NSLog(@"-----NSJSONSerialization-----解析出错");
return;
}
if ([root isKindOfClass:[NSDictionary class]]) {
id jsonInfo = [root objectForKey:@"info"];
if ([jsonInfo isKindOfClass:[NSDictionary class]]) {
NSInteger error = [[jsonInfo objectForKey:@"error"] intValue];
NSInteger type = [[jsonInfo objectForKey:@"type"] intValue];
NSLog(@"error = %d,type = %d",error,type);
}
id jsonPoiList = [root objectForKey:@"poilist"];
if ([jsonPoiList isKindOfClass:[NSArray class]]) {
NSArray* jsonPoiArray = (NSArray*)jsonPoiList;
for (id jsonPoiDic in jsonPoiArray) {
if ([jsonPoiDic isKindOfClass:[NSDictionary class]]) {
NSString* name = [jsonPoiDic objectForKey:@"name"];
double x = [[jsonPoiDic objectForKey:@"x"] doubleValue];
double y = [[jsonPoiDic objectForKey:@"y"] doubleValue];
NSLog(@"poi:{name=%@,x=%f,y=%f}",name,x,y);
}
}
}
}
NSLog(@"-----NSJSONSerialization-----完成解析");
}
- (void)jsonBuild
{
NSLog(@"-----NSJSONSerialization-----开始生成jSON数据");
NSDictionary* jsonDic = [[NSMutableDictionary alloc] init];
//添加info字段
NSDictionary* jsonInfoDic = [[NSMutableDictionary alloc] init];
[jsonInfoDic setValue:[NSNumber numberWithInteger:0] forKey:@"error"];
[jsonInfoDic setValue:[NSNumber numberWithInteger:34] forKey:@"type"];
[jsonDic setValue:jsonInfoDic forKey:@"info"];
[jsonInfoDic release];
//添加poilist字段
NSDictionary* poi1 = [NSDictionary dictionaryWithObjectsAndKeys:
@"银科大厦",@"name",
[NSNumber numberWithDouble:116.345],@"x",
[NSNumber numberWithDouble:39.3334],@"y",
nil];
NSDictionary* poi2 = [NSDictionary dictionaryWithObjectsAndKeys:
@"中国技术交易大厦",@"name",
[NSNumber numberWithDouble:116.3451],@"x",
[NSNumber numberWithDouble:39.31334],@"y",
nil];
NSArray* jsonPoiList = [NSArray arrayWithObjects:poi1,poi2, nil];
[jsonDic setValue:jsonPoiList forKey:@"poilist"];
__autoreleasing NSError* error = nil;
NSData* jsonData = [NSJSONSerialization dataWithJSONObject:jsonDic
options:NSJSONWritingPrettyPrinted error:&error];
__autoreleasing NSString* jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(@"jsonString=%@",jsonString);
[jsonDic release];
NSLog(@"-----NSJSONSerialization-----完成生成jSON数据");
}
@end
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