iOS上传照片

UploadPhotoViewController.h 头文件

 #import <UIKit/UIKit.h>
 #import "MBProgressHUD.h"
 @interface UploadPhotoViewController :UIViewController<MBProgressHUDDelegate,UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate>{
     MBProgressHUD *HUD;
 }
 -(void) snapImage;//拍照
 -(void) pickImage;//从相册里找
 - (UIImage *)scaleToSize:(UIImage *)img size:(CGSize)size;//把图缩放到合适的尽寸
 @end

UploadPhotoViewController.m 源文件

 #import "UploadPhotoViewController.h"
 #import"ASIFormDataRequest.h"//ASIRequest用来上传图片
 #import"HJManagedImageV.h"  //HJManagedImageV是图片缓存类，可以用其它异步加载图片类取代
 #import "JSON.h"
 #define UPLOAD_URL @"http://localhost/upload.php"//上传地址
 @implementation UploadPhotoViewController

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 {
     self = [superinitWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
         // Custom initialization
     }
     return self;
 }

 - (void)didReceiveMemoryWarning
 {
     // Releases the view if it doesn't have a superview.
     [superdidReceiveMemoryWarning];

     // Release any cached data, images, etc that aren't in use.
 }

 #pragma mark - View lifecycle

 - (void)viewDidLoad
 {
     [superviewDidLoad];
     // Do any additional setup after loading the view from its nib.
     self.title =@"上代图片例子";
 }

 - (void)viewWillAppear:(BOOL)animated
 {
     [super viewWillAppear:animated];

     HJManagedImageV* mi = [[[HJManagedImageValloc] initWithFrame:CGRectMake(20,20,280,280)]autorelease];
     mi.url = [NSURL URLWithString:@"图片地址"]];
     [mi showLoadingWheel];
     mi.tag = 777 ;
     [self.scrollView addSubview:mi];
     MyAppDelegate *appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
     [mi setCallbackOnImageTap:self method:@selector(uploadPortrait:)];//点击图片，执行上传图片操作
     [appDelegate.objMan manage:mi];//加载图片
 }

 - (void)viewDidUnload
 {
     [superviewDidUnload];
     // Release any retained subviews of the main view.
     // e.g. self.myOutlet = nil;
 }

 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
 {
     // Return YES for supported orientations
     return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }

 - (void)dealloc {
     [super dealloc];
 }

 //上传图片操作开始，选择图片的来源
 -(void)uploadPortrait:(id)sender{
     UIActionSheet *menu = [[UIActionSheetalloc]
                            initWithTitle: @"更改图片"
                            delegate:self
                            cancelButtonTitle:@"取消"
                            destructiveButtonTitle:nil
                            otherButtonTitles:@"拍照",@"从相册上传",nil];
     menu.actionSheetStyle =UIActionSheetStyleBlackTranslucent;
     [menu showInView:self.navigationController.view];
 }
 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
 {
     if(buttonIndex == 0){
          [self snapImage];
     }else if(buttonIndex ==1){
         [self pickImage];
     }
     [actionSheet release];
 }

 - (UIImage *)scaleToSize:(UIImage *)img size:(CGSize)size{
     // 创建一个bitmap的context
     // 并把它设置成为当前正在使用的context
     UIGraphicsBeginImageContext(size);
     // 绘制改变大小的图片
     [img drawInRect:CGRectMake(0,0, size.width, size.height)];
     // 从当前context中创建一个改变大小后的图片
     UIImage* scaledImage =UIGraphicsGetImageFromCurrentImageContext();
     // 使当前的context出堆栈
     UIGraphicsEndImageContext();
     //返回新的改变大小后的图片
     return scaledImage;
 }
 -(void)uploadPortraitTask:(NSDictionary *)info{
     // Do something usefull in here instead of sleeping ...
     NSURL *URL = [NSURLURLWithString:UPLOAD_URL];
     ASIFormDataRequest *Request = [ASIFormDataRequestrequestWithURL:URL];
     [Request setRequestMethod:@"POST"];
     [Request addRequestHeader:@"Content-Type"value:@"application/json"];
     [Request setTimeOutSeconds:60];

     //[Request setPostValue:auth forKey:@"auth"];
     UIImage *img = [selfscaleToSize:[infoobjectForKey:@"UIImagePickerControllerOriginalImage"]size:CGSizeMake(300,300)];
     [Request setData:UIImagePNGRepresentation(img)forKey:@"file"];

     [Request setDelegate:self];
     [Request setCompletionBlock:^{
         NSString *responseString = [Request responseString];
         //NSLog(@"Response: %@", responseString);
         NSDictionary *info = [responseString JSONValue];
         NSNumber *status = [info objectForKey:@"status"];
         if([status intValue]==1){
             HJManagedImageV* mi = (HJManagedImageV *)[self.viewviewWithTag:777];
             //set the URL that we want the managed image view to load
             [mi clear];
             mi.url = [NSURLURLWithString:[info objectForKey:@"filePath"]];
             [mi showLoadingWheel];
             mi.tag = 777 ;
             IBMEventAppDelegate *appDelegate = (IBMEventAppDelegate *)[[UIApplicationsharedApplication] delegate];
             //[mi setCallbackOnImageTap:self method:@selector(uploadPortrait:)];
             [appDelegate.objMan manage:mi];
             [appDelegate loadLoginInfoData];
             UIAlertView *av=[[[UIAlertViewalloc] initWithTitle:nilmessage:@"图片上传成功!" delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil]autorelease];
             [av show];

         }else if([statusintValue]==-1){
             UIAlertView *av=[[[UIAlertViewalloc] initWithTitle:nilmessage:[info objectForKey:@"msg"]delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil]autorelease];
             [av show];
         }else{
             UIAlertView *av=[[[UIAlertViewalloc] initWithTitle:nilmessage:[info objectForKey:@"msg"]delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil]autorelease];
             [av show];
         }
         [MBProgressHUDhideHUDForView:self.navigationController.viewanimated:YES];
     }];
     [Request setFailedBlock:^{
         NSError *error = [Request error];
         NSLog(@"Error: %@,%@", error.localizedDescription,Request.url);
     }];
     [Request startSynchronous];
 }
 - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;
 {
 if (!error){
         UIAlertView *av=[[[UIAlertViewalloc] initWithTitle:nilmessage:@"Image written to photo album"delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil]autorelease];
         [av show];
     }else{
         UIAlertView *av=[[[UIAlertViewalloc] initWithTitle:nilmessage:[NSStringstringWithFormat:@"Error writing to photo album: %@",[errorlocalizedDescription]] delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil]autorelease];
         [av show];
     }

 }
 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
 {
     HUD = [MBProgressHUDshowHUDAddedTo:self.navigationController.viewanimated:YES];
     HUD.dimBackground =YES;
     HUD.delegate =self;
     HUD.labelText =@"请稍等";
 HUD.square =YES;
     [HUDshowWhileExecuting:@selector(uploadPortraitTask:)onTarget:selfwithObject:info animated:YES];
 //SETIMAGE([info objectForKey:@"UIImagePickerControllerOriginalImage"]);
 [selfdismissModalViewControllerAnimated:YES];
 [picker release];
 }

 // Provide 2.x compliance
 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
 {
 NSDictionary *dict = [NSDictionarydictionaryWithObject:imageforKey:@"UIImagePickerControllerOriginalImage"];
 [selfimagePickerController:picker didFinishPickingMediaWithInfo:dict];
 }

 // Optional but "expected" dismiss
 /*
  - (void) imagePickerControllerDidCancel:
  (UIImagePickerController *)picker
  {
  [self dismissModalViewControllerAnimated:YES];
  [picker release];
  }
  */

 - (void) pickImage
 {
 UIImagePickerController *ipc = [[UIImagePickerControlleralloc] init];
 ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 ipc.delegate =self;
 ipc.allowsEditing =NO;
 [selfpresentModalViewController:ipc animated:YES];
 }

 - (void) snapImage
 {
 UIImagePickerController *ipc = [[UIImagePickerControlleralloc] init];
 ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
 ipc.delegate =self;
 ipc.allowsEditing =NO;
 [selfpresentModalViewController:ipc animated:YES];
 }