［示例总结］PicDecor实践总结

1.打开相册获取图片

.h文件：

@interface VCImageEditing :UIViewController <UIImagePickerControllerDelegate,UINavigationControllerDelegate>

.m文件：

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

    [selfdismissModalViewControllerAnimated:NO];

    UIImage *i = [infoobjectForKey:UIImagePickerControllerOriginalImage];

    // 处理获取到的图片，比如以下在图片子视图下显示当前获取的图片

    [ivEditingImagesetImage:i];

    [self.viewsendSubviewToBack:ivEditingImage];

}

在需要弹出相册的地方加入以下代码：

    UIImagePickerController *ipController = [[UIImagePickerControlleralloc] init];

    [ipController setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    [ipController setDelegate:self];

    [selfpresentModalViewController:ipController animated:YES];

另外，在需要弹出摄像头的地方加入以下代码：

    UIImagePickerControllerSourceType sourceType =UIImagePickerControllerSourceTypeCamera;

   if ([UIImagePickerControllerisSourceTypeAvailable:sourceType])

    {

       UIImagePickerController *ipController = [[UIImagePickerControlleralloc] init];

        [ipControllersetSourceType:sourceType];

        [ipControllersetDelegate:self];

        [selfpresentModalViewController:ipController animated:YES];

    }

2.发送邮件

.h文件：(需提前添加MessageUI.framework的引用)

#import<MessageUI/MessageUI.h>

@interface VCImageEditing :UIViewController <MFMailComposeViewControllerDelegate>

.m文件：

- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error

{

    [selfdismissModalViewControllerAnimated:YES];

}

在需要弹出相册的地方加入以下代码：

    MFMailComposeViewController *mailController = [[MFMailComposeViewControlleralloc] init];

    mailController.mailComposeDelegate = self;

    // 本实例用到的时一张图片数据

    UIImage *i = [selfsaveImage:self.view];

    NSData *imageAsData = UIImagePNGRepresentation(i);

    [mailController addAttachmentData:imageAsDatamimeType:@"image/png"fileName:@"PicDecor.png"];

    [mailController setSubject:@"My PicDecor Image"];

    [selfpresentModalViewController:mailController animated:YES];

3.拖动图片

创建一个ImageView子类，如下：

MovableImageView.h文件：

@interface MovableImageView :UIImageView

@end

MovableImageView.m文件：

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [supertouchesBegan:touches withEvent:event];

}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

    [supertouchesEnded:touches withEvent:event];

}

-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

    [supertouchesMoved:touches withEvent:event];

    

   float deltaX = [[touchesanyObject] locationInView:self].x - [[touchesanyObject] previousLocationInView:self].x;

   float deltaY = [[touchesanyObject] locationInView:self].y - [[touchesanyObject] previousLocationInView:self].y;

    self.transform = CGAffineTransformTranslate(self.transform, deltaX, deltaY);

}

在需要加入可拖动图片的地方加入以下代码：

    MovableImageView *movableImageView = [[MovableImageViewalloc] initWithImage:image];

    [movableImageViewsetUserInteractionEnabled:YES];

    [self.viewaddSubview:movableImageView];