iOS 获取相机与相册，上传服务器

UIActionSheet* actionSheet = [[UIActionSheet alloc] 
initWithTitle:nil 
delegate:self 
cancelButtonTitle:@”取消” 
destructiveButtonTitle:nil 
otherButtonTitles:@”拍照”,@”从相册选取”,nil]; 
[actionSheet showInView:self.view];

pragma mark—-

pragma mark—- ActionSheet Delegate Methods

• (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 
  switch (buttonIndex) { 
  case 0://拍照 
  { 
  if (![self ifCanUseSystemCamera]) { 
  UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@”此应用已被禁用系统相机” message:@”请在iPhone的 \”设置->隐私->相机\” 选项中,允许 \”自己App的名字\” 访问你的相机” delegate:self cancelButtonTitle:nil otherButtonTitles:@”确认”, nil]; 
  [alert show]; 
  }else { 
  UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; 
  imagePicker.delegate = self; 
  imagePicker.allowsEditing = YES; 
  imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; 
  [self presentViewController:imagePicker animated:YES completion:nil]; 
  } 
  } 
  break; 
  case 1://从相册选择 
  { 
  UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; 
  imagePicker.delegate = self; 
  imagePicker.allowsEditing = YES; 
  imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
  [self presentViewController:imagePicker animated:YES completion:nil];

      }        break;    default:        break;}

  }

pragma mark -

pragma UIImagePickerController Delegate

• (void)imagePickerController:(UIImagePickerController )picker didFinishPickingMediaWithInfo:(NSDictionary )info { 
  if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(__bridge NSString *)kUTTypeImage]) { 
  UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage]; 
  [self performSelector:@selector(saveImage:) withObject:img afterDelay:0.5]; 
  } 
  [picker dismissViewControllerAnimated:YES completion:nil]; 
  } 
  //点击cancel时调用该方法
• (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { 
  [picker dismissViewControllerAnimated:YES completion:nil]; 
  } 
  //保存图片

• (void)saveImage:(UIImage *)image { 
  BOOL success; 
  NSFileManager *fileManager = [NSFileManager defaultManager]; 
  NSError *error;

  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
  NSString *documentsDirectory = [paths objectAtIndex:0]; 
  //本地图片路径 
  NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@”image.jpg”]; 
  success = [fileManager fileExistsAtPath:imageFilePath]; 
  if(success) { 
  success = [fileManager removeItemAtPath:imageFilePath error:&error]; 
  } 
  //UIImage *smallImage2=[self scaleFromImage:image toSize:CGSizeMake(80.0f, 80.0f)];//将图片尺寸改为80*80 
  UIImage *smallImage = [self thumbnailWithImageWithoutScale:image size:CGSizeMake(93, 93)]; 
  [UIImageJPEGRepresentation(smallImage, 1.0f) writeToFile:imageFilePath atomically:YES];//写入文件 
  //UIImage *selfPhoto = [UIImage imageWithContentsOfFile:imageFilePath];//读取图片文件 
  NSData *imageData = UIImageJPEGRepresentation(smallImage, 1.0); 
  [self userSetAvatarWithData:imageData]; 
  } 
  //上传至服务器

• (void)userSetAvatarWithData:(NSData *)imageData { 
  AFHTTPRequestOperationManager *manger = [AFHTTPRequestOperationManager manager]; 
  manger.responseSerializer = [AFHTTPResponseSerializer serializer]; 
  manger.requestSerializer = [AFHTTPRequestSerializer serializer]; 
  manger.requestSerializer.timeoutInterval = 10;

  NSString *url = [NSString stringWithFormat:@”上传头像的接口”]; 
  url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 
  [manger POST:url parameters:nil constructingBodyWithBlock:^(id formData) { 
  [formData appendPartWithFileData:data name:@”随便取不能为空” fileName:@”随便取不能为空” mimeType:@”image/jpg”]; 
  } success:^(AFHTTPRequestOperation *operation, id responseObject) { 
  NSLog(@”上传成功”); 
  } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
  NSLog(@”上传失败”); 
  }]; 
  }

// 此方法可以改变图片的大小,方便上传到服务器 
- (UIImage ) scaleFromImage: (UIImage ) image toSize: (CGSize) size { 
UIGraphicsBeginImageContext(size); 
[image drawInRect:CGRectMake(0, 0, size.width, size.height)]; 
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 
return newImage; 
} 
//2.保持图片原来的长宽比，生成一个缩略图 
- (UIImage )thumbnailWithImageWithoutScale:(UIImage )image size:(CGSize)asize { 
UIImage *newimage; 
if (nil == image) { 
newimage = nil; 
} 
else{ 
CGSize oldsize = image.size; 
CGRect rect; 
if (asize.width/asize.height > oldsize.width/oldsize.height) { 
rect.size.width = asize.height*oldsize.width/oldsize.height; 
rect.size.height = asize.height; 
rect.origin.x = (asize.width - rect.size.width)/2; 
rect.origin.y = 0; 
} 
else{ 
rect.size.width = asize.width; 
rect.size.height = asize.width*oldsize.height/oldsize.width; 
rect.origin.x = 0; 
rect.origin.y = (asize.height - rect.size.height)/2; 
} 
UIGraphicsBeginImageContext(asize); 
CGContextRef context = UIGraphicsGetCurrentContext(); 
CGContextSetFillColorWithColor(context, [[UIColor clearColor] CGColor]); 
UIRectFill(CGRectMake(0, 0, asize.width, asize.height));//clear background 
[image drawInRect:rect]; 
newimage = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 
} 
return newimage; 
} 
//判断是否支持相机 
- (BOOL)ifCanUseSystemCamera{ 
NSString *mediaType = AVMediaTypeVideo; 
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType]; 
if(authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied){

    NSLog(@"相机权限受限");    return NO;}return YES;

}