数据解析。

@interface ViewController (){

    __weak IBOutlet UITextView *textvieww;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

/*

 例解析一下json数据

 {"name":"zhangmi","age":"18"} 返回字典类型

 {"user":{"name":"zhangmi","age":"18"}}

 [{"name":"zhangmi"},{"name":"xiaogou"}]返回数组类型

 {"user":[{"name":"zhangmi"},{"name":"xiaogou"}]}

 */

- (IBAction)jsonnn:(id)sender {

    //网络解析

    NSURL *url=[NSURL URLWithString:@"http://192.168.100.163/admin/test/test.html"];

    //1  NSData *urlData=[NSData dataWithContentsOfURL:url];

    /*2

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

    NSData *urlData=[jsonStr dataUsingEncoding:NSUTF8StringEncoding];

     */

    NSURLRequest *re1=[[NSURLRequest alloc]initWithURL:url];

    NSData *urlData=[NSURLConnection sendSynchronousRequest:re1 returningResponse:nil error:nil];

    id jsonUrl=[NSJSONSerialization JSONObjectWithData:urlData options:NSJSONReadingAllowFragments error:nil];

    if ([jsonUrl isKindOfClass:[NSDictionary class]]) {

        NSDictionary *dicc=(NSDictionary*)jsonUrl;

        textvieww.text=[textvieww.text stringByAppendingString:@"\n"];

        textvieww.text=[textvieww.text stringByAppendingString:[dicc objectForKey:@"name"]];

        textvieww.text=[textvieww.text stringByAppendingString:@"\n"];

        textvieww.text=[textvieww.text stringByAppendingString:[dicc objectForKey:@"age"]];

    }

    /*

    //要解析的字符串进行转义

    NSString *jsonStr = @"{\"name\":\"zhangmi\",\"age\":\"18\"}";

    //转换数据类型

    NSData *jsonData=[jsonStr dataUsingEncoding:NSUTF8StringEncoding];

    //通过NSJSONSerialization类解析json数据

    //参数1要传入的数据 参数2 枚举类型：NSJSONReadingAllowFragments允许要解析的数据可以不是nsdictionary和nsarray

    //NSJSONReadingMutableContainers 返回一个可变字典或可变数组  NSJSONReadingMutableLeaves返回一个可变字符串

    //返回值可能是字典类型也可能是数组类型 所以定义为id类型 再对返回值进行判断  error：可以设置报错信息

    id jsonObj  =[NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];

    //判断解析出来的类型

    if ([jsonObj isKindOfClass:[NSDictionary class]]) {

        //字典类型

        //强制转换成字典对象

        NSDictionary *dic=(NSDictionary*)jsonObj;

        textvieww.text=[textvieww.text stringByAppendingString:@"\n"];

        //访问key值 得到value值

        textvieww.text=[textvieww.text stringByAppendingString:[dic objectForKey:@"name"]];

        //回车

        textvieww.text=[textvieww.text stringByAppendingString:@"\n"];

        textvieww.text=[textvieww.text stringByAppendingString:[dic objectForKey:@"age"]];

    }

    if ([jsonObj isKindOfClass:[NSArray class]]) {

        //数组类型

    }

    */

}

老师可不可以帮忙调试一下是什么问题