拍摄相片

- (IBAction)takePicture:(id)sender
{// Make sure camera is available//UIImagePickerControllerSourceTypePhotoLibrary,访问设备上保存的所有照片//UIImagePickerControllerSourceTypeCamera,//UIImagePickerControllerSourceTypeSavedPhotosAlbum只能用于访问Camera                   Roll相册if ([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO){UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"message:@"Camera Unavailable"delegate:selfcancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];[alert show];return;}if (self.imagePicker == nil){self.imagePicker = [[UIImagePickerController alloc] init];self.imagePicker.delegate = self;self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;self.imagePicker.allowsEditing = YES;//可编辑状态}[self presentViewController:self.imagePicker animated:YES completion:NULL];
}

//取回相片、更新图像视图，隐藏图像选取器

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{UIImage * image = [info objectForKey:UIImagePickerControllerEditedImage];//可编辑状态UIImageWriteToSavedPhotosAlbum (image, nil, nil , nil);//照片保存到相册中self.imageView.image = image;self.imageView.contentMode = UIViewContentModeScaleAspectFill;//充满整个视图

//self.imageView.contentMode = UIViewContentModeScaleAspectFit;//固定纵横比显示整张图片

   [self dismissViewControllerAnimated:YES completion:NULL];

}

//取消图片选择，隐藏图片选择器
- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker
{[self dismissViewControllerAnimated:YES completion:NULL];
}

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