上传文件至服务器

//上传图片-(void)showActionSheet{    //在这里呼出下方菜单按钮项    myActionSheet = [[UIActionSheet alloc]                     initWithTitle:nil                     delegate:self                     cancelButtonTitle:@"取消"                     destructiveButtonTitle:nil                     otherButtonTitles: @"打开照相机", @"从手机相册获取",nil];        [myActionSheet showInView:self.view];    [myActionSheet release];    }- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{            //呼出的菜单按钮点击后的响应    if (buttonIndex == myActionSheet.cancelButtonIndex)    {        NSLog(@"取消");    }        switch (buttonIndex)    {        case 0:  //打开照相机拍照            [self takePhoto];            break;                    case 1:  //打开本地相册            [self LocalPhoto];            break;    }}//开始拍照-(void)takePhoto{    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])    {        UIImagePickerController *picker = [[UIImagePickerController alloc] init];        picker.delegate = self;        //设置拍照后的图片可被编辑        picker.allowsEditing = YES;        picker.sourceType = sourceType;        [picker release];        [self presentViewController:picker animated:YES completion:nil];    }else    {        NSLog(@"模拟其中无法打开照相机,请在真机中使用");    }}//打开本地相册-(void)LocalPhoto{    UIImagePickerController *picker = [[UIImagePickerController alloc] init];        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;    picker.delegate = self;    //设置选择后的图片可被编辑    picker.allowsEditing = YES;    [self presentViewController:picker animated:YES completion:nil];    [picker release];}//当选择一张图片后进入这里-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{        NSString *type = [info objectForKey:UIImagePickerControllerMediaType];        //当选择的类型是图片    if ([type isEqualToString:@"public.image"])    {   NSLog(@"您选择了该图片");        //先把图片转成NSData        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];        NSData *data;        if (UIImagePNGRepresentation(image) == nil)        {            data = UIImageJPEGRepresentation(image, 1.0);        }        else        {            data = UIImagePNGRepresentation(image);        }                        //图片保存的路径        //这里将图片放在沙盒的documents文件夹中        NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];                        //文件管理器        NSFileManager *fileManager = [NSFileManager defaultManager];                //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png        [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];                //得到选择后沙盒中图片的完整路径        filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];                //关闭相册界面        [picker dismissViewControllerAnimated:YES completion:nil];                [self imageUpload:image];                    }    }- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{    NSLog(@"您取消了选择图片");    [picker dismissViewControllerAnimated:YES completion:nil];}//上传图片到服务器方法，采用了ASIFormDataRequest方法- (void) imageUpload:(UIImage *) image{        UIImage *im = [UIImage imageWithContentsOfFile:filePath];//通过path图片路径获取图片    NSData *data = UIImagePNGRepresentation(im);//获取图片数据    /*     ios中获取图片的方法有两种，一种是UIImageJPEGRepresentation ，一种是UIImagePNGRepresentation     前者获取到图片的数据量要比后者的小很多。。     */    //服务器地址    NSURL *url = [NSURL URLWithString:@"这里写入你的服务器上传地址"];    aRequest = [[ASIFormDataRequest alloc] initWithURL:url];        [aRequest setDelegate:self];//代理    [aRequest setRequestMethod:@"POST"];    //这个参数还不是很清楚    [aRequest addData:data withFileName:@"test.png" andContentType:@"image/png" forKey:@"file"];    [aRequest addRequestHeader:@"Content-Type" value:@"multipart/form-data"];//这里的value值 需与服务器端 一致        [aRequest startAsynchronous];//开始。异步    [aRequest setDidFinishSelector:@selector(headPortraitSuccess)];//当成功后会自动触发 headPortraitSuccess 方法    [aRequest setDidFailSelector:@selector(headPortraitFail)];//如果失败会 自动触发 headPortraitFail 方法    }-(void)headPortraitSuccess{    NSData * myResponseData = [aRequest responseData];  //获取数据 :  调试的时候,在这里, myResponseData的值一直是nil,不知道为什么?    //将接收的数据转换成NSString类型并打印出来    NSString *result = [[NSString alloc] initWithData:myResponseData encoding:NSUTF8StringEncoding];    NSLog(@"result------------>%@", result);    NSDictionary *data = [result objectFromJSONStringWithParseOptions:JKParseOptionLooseUnicode];    NSArray *imgArray = [data objectForKey:@"data"];    NSString *imgpath=@"http://twww.51qed.com";    if ([imgArray count]) {        NSDictionary *imgInfo = [imgArray objectAtIndex:0];        imgpath = [imgpath stringByAppendingString:[imgInfo objectForKey:@"img"]];        NSLog(@"imgpath------------>%@", imgpath);    }    //设置H5图片更新,ios调用JS代码    [webview stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"setNewImg('%@');",imgpath]];    NSLog(@"上传成功！");    [aRequest release];    }-(void)headPortraitFail{            NSLog(@"上传失败！");    }//开始request请求- (void)requestStarted:(ASIHTTPRequest *)request{            NSLog(@"开始请求！");    }@end

需导入

<pre name="code" class="objc">#import "ASIHTTPRequest.h"#import "ASIFormDataRequest.h"#import "JSONKit.h"

这三个头文件