iOS中POST异步请求

2019-11-14 18:06:19

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POST异步请求（代理）

1、遵循<NSURLConnectionDataDelegate>

@interface ViewController ()<NSURLConnectionDataDelegate>

2、NSMutableData类型的reData属性是用来拼接数据的

@PRoperty (nonatomic,strong)NSMutableData *reDtata;

3、获取url

 NSString *urlString = @"http://api.tudou.com/v3/gw";    NSURL *url = [NSURL URLWithString:urlString];

4、创建request请求

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

5、设置HTTPMethod为POST请求（默认为GET请求）

request.HTTPMethod = @"POST";

6、设置HTTPBody（url中的body部分，如果body部分含有中文需要转化）

 NSString *bodyStr = @"method=album.channel.get&appKey=myKey&format=json&channel=c&pageNo=1&pageSize=15";    NSData *bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];    request.HTTPBody = bodyData;

7、创建连接并设置代理

  [NSURLConnection connectionWithRequest:request delegate:self];

8、实现代理方法

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    self.reDtata = [NSMutableData data];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [_reDtata appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{    NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:_reDtata options:(NSJSONReadingAllowFragments) error:nil];    NSLog(@"%@",dic);}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{    }

下面是实现的所有代码

- (IBAction)postAsyc:(id)sender｛｝是从storyboard里面拖出来的控件代码，也可以直接写代码实现，写一个button和它的实现方法即可。

#import "ViewController.h"@interface ViewController ()<NSURLConnectionDataDelegate>@property (nonatomic,strong)NSMutableData *reDtata;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (IBAction)postAsyc:(id)sender {    NSString *urlString = @"http://api.tudou.com/v3/gw";    NSURL *url = [NSURL URLWithString:urlString];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];    request.HTTPMethod = @"POST";    NSString *bodyStr = @"method=album.channel.get&appKey=myKey&format=json&channel=c&pageNo=1&pageSize=15";    NSData *bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];    request.HTTPBody = bodyData;    [NSURLConnection connectionWithRequest:request delegate:self];    }- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    self.reDtata = [NSMutableData data];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [_reDtata appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{    NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:_reDtata options:(NSJSONReadingAllowFragments) error:nil];    NSLog(@"%@",dic);}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{    }- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end