ASIHTTPRequest框架使用总结系列之阿堂教程5（上传数据）

在上篇文章中，阿堂和网友们分享了如何用ASIHTTPRequest框架下载数据的实例，本篇阿堂将数据介绍如何用ASIHTTPRequest框架上传数据的应用实例。

      数据上传是通过ASIHTTPRequest类实现的。前面提到，ASIFormDataRequest相当于html的表单，当用户通过submit按钮提交给服务器。因此，ASIFormDataRequest请求对象的作用相当于提交表单数据，默认采用post请求方法。

 

     下面，阿堂提供的这个实例是将项目应应用中的test1.jpg上传到服务端，然后，接将将服务端的test1.jsp又下载到界面中再显示出来。

 

     

 

    本应用使用ASIHTTPRequest框架上传，下载文件的主要调用代码如下

ViewController.h,  ViewController.m

 

#import

#import "ASIHTTPRequest.h"

#import "ASIFormDataRequest.h"

#import "NSNumber+Message.h"

#import "NSString+URLEncoding.h"

@interface ViewController : UIViewController

@property (weak, nonatomic) IBOutlet UIImageView *imageView1;

@property (weak, nonatomic) IBOutlet UIImageView *imageView2;

- (IBAction)onClick:(id)sender;

@end

 

------------------------------------------------------------------

#import "ViewController.h"

@interface ViewController ()

@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.

}

- (IBAction)onClick:(id)sender {

    

    NSString *strURL1 = @"http://www.crazyit.com/service/upload.php";

    

NSURL *url1 = [NSURL URLWithString:[strURL1 URLEncodedString]];

    

    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url1];

    [request setPostValue:@"heyitang@qq.com" forKey:@"email"];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"test1" ofType:@"jpg"];

    

    [request setFile:path forKey:@"file"];

    [request setDelegate:self];

    [request setDidFinishSelector:@selector(requestSuccess:)];

    [request setDidFailSelector:@selector(requestError:)];

    [request startAsynchronous];

    

}

- (void)requestSuccess:(ASIHTTPRequest *)request

{

    NSData *data = [request responseData];

    NSError *eror;

    NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:dataoptions:NSJSONReadingAllowFragments error:&eror];

    if (!resDict) {

        

        //查看图片

        [self seeImage];

        

    } else {

        NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"];

        

        NSString *errorStr = [resultCodeObj errorMessage];

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"错误信息"

                                                            message:errorStr

                                                           delegate:nil

                                                  cancelButtonTitle:@"OK"

                                                  otherButtonTitles: nil];

        [alertView show];

    }

}

- (void)requestError:(ASIHTTPRequest *)request

{

    NSError *error = [request error];

    NSLog(@"%@",[error localizedDescription]);

}

-(void)seeImage

{

    NSString *strURL = [[NSString alloc] initWithFormat:@"http://www.crazyit.com/service/download.php?email=%@&FileName=test1.jpg",@"heyitang@qq.com"];

    

    NSURL *url = [NSURL URLWithString:[strURL URLEncodedString]];

    

    __weak ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];

    [request setCompletionBlock:^{

        

        NSData *data  = [request responseData];

        

        UIImage *img = [UIImage imageWithData:data];

        _imageView1.image = img;

        

    }];

    [request setFailedBlock:^{

        NSError *error = [request error];

        NSLog(@"%@", [error localizedDescription]);

        

    }];

    [request startAsynchronous];

}

@end