sbjson框架使用 jsonDemo1 json操作 请求，下载，转码

首先需要导入SBJson框架 在导入头文件 在进行操作

#import "SBJson.h"

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

//XML JSON 描述性语言

//甄嬛传 大清后宫。。。 99$

//{"book":"甄嬛传","jianjie":"大清后宫","price":"99$"}

//["甄嬛传","超人","蜘蛛侠"]

/*

[{"book":"甄嬛传","jianjie":"大清后宫","price":"99$"},{"book":"超人","jianjie":"美国后宫","price":"9$"}]

*/

NSString* str = @"{\"book\":\"甄嬛传\",\"jianjie\":\"大清后宫\"}";

//通过JSONValue方法解析json字符串得到字典或数组对象

NSDictionary* dic = [str JSONValue];

NSLog(@"%@",[dic objectForKey:@"book"]);

str = @"[\"甄嬛传\",\"超人\",\"蜘蛛侠\"]";

NSArray* array = [str JSONValue];

for (NSString* bookStr in array) {

NSLog(@"%@",bookStr);

}

/*
http://www.baidu.com/abc/bbc/1.jpg http:// 请求类型 http:// ftp://
www.baidu.com 请求地址 ip

/abc/bbc/1.jpg 路径

*/

//请求地址

NSString* urlStr = @"http://192.168.88.8/sns/my/user_list.php";

NSURL* url = [NSURL URLWithString:urlStr];

str = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

dic = [str JSONValue];

array = [dic objectForKey:@"users"];

NSDictionary* userDic = [array objectAtIndex:0];

NSString* imageUrl = [userDic objectForKey:@"headimage"];

imageUrl = [NSString stringWithFormat:@"http://192.168.88.8/sns%@",imageUrl];

NSLog(@"%@", imageUrl);

//下载数据

NSData* data = [NSData dataWithContentsOfURL:[NSURL URLWithString:imageUrl]];

//NSData->UIImage

UIImage* image = [UIImage imageWithData:data];

//UIImage->UIColor

self.view.backgroundColor = [UIColor colorWithPatternImage:image];

//NSData->NSString

//NSString* str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

str = @"http://book.douban.com/subject_search?search_text=甄嬛传&cat=1001";

url = [NSURL URLWithString:str];

str = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

NSLog(@"%@", str);

//中文转码

str = @"甄嬛传";

str = [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSLog(@"%@",str);

UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

button.frame = CGRectMake(100, 100, 100, 40);

[button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

}

- (void)buttonClick{

NSString* str = @"http://pic.desk.chinaz.com/file/201207/7/kamchongerczwp1.jpg";

NSURL* url = [NSURL URLWithString:str];

NSData* data = [NSData dataWithContentsOfURL:url];

UIImage* image = [UIImage imageWithData:data];

self.view.backgroundColor = [UIColor colorWithPatternImage:image];

}

@end

后面还有json解析数组操作