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