使用异步Get在新浪微博上获取最新的微博

#import <Foundation/Foundation.h>@interface WeiBo : NSObject@property (nonatomic,strong) NSArray *statuses;@property (nonatomic,strong) NSArray *advertises;@property (nonatomic,strong) NSArray *ad;@property (nonatomic,strong)NSNumber *hasvisible;@property (nonatomic,strong)NSNumber *previous_cursor;@property (nonatomic,strong)NSNumber *next_cursor;@property (nonatomic,strong)NSNumber *total_number;@property (nonatomic,strong)NSNumber *interval;@property (nonatomic,strong)NSNumber *uve_blank;@property (nonatomic,strong)NSNumber *since_id;@property (nonatomic,strong)NSNumber *max_id;@property (nonatomic,strong)NSNumber *has_unread;-(id)initWithDictionary:(NSDictionary *)dictionary;@end#import "WeiBo.h"@implementation WeiBo-(id)initWithDictionary:(NSDictionary *)dictionary{    if (self = [super init])    {        [self setValuesForKeysWithDictionary:dictionary];    }    return self;}@end

#import "ViewController.h"#import "WeiBo.h"@interface ViewController ()<NSURLConnectionDataDelegate>{    NSMutableData *mData;}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}//异步Get- (IBAction)asynchronousGet:(id)sender {    //获取url    NSString *urlString = @"https://api.weibo.com/2/statuses/home_timeline.json?access_token=2.00bUKyMD0Spw_tebfe20df130tHaM_";    //编码    urlString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];    //转换成NSURL    NSURL *url = [NSURL URLWithString:urlString];    //创建并返回一个URL请求,指向一个指定的URL,采用对应的缓存策略 和 超时响应时长(默认时长60秒)  NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];   NSConnection *connectionGet = [NSURLConnection connectionWithRequest:request delegate:self];   }//服务器开始响应,准备向客户发送信息-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    mData = [NSMutableData data];}//服务器接收数据,并且此方法会执行多次-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [mData appendData:data];}//接收数据完成-(void)connectionDidFinishLoading:(NSURLConnection *)connection{    //Json数据格式解析,利用系统提供的API进行Json数据解析   NSDictionary *dictionay = [NSJSONSerialization JSONObjectWithData:mData options:NSJSONReadingAllowFragments error:nil];    WeiBo *weibo = [[WeiBo alloc]initWithDictionary:dictionay];    [self.TextView performSelectorOnMainThread:@selector(setText:) withObject:[weibo.statuses[0] objectForKey:@"text"] waitUntilDone:NO];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end