here is my code
-(void)gridCell:(GridCell *)gCell didSelectImageAtIndex:(NSInteger)index imagSize:(CGRect )frameSize
{
UIImage *img=[UIImage imageNamed:#"Overlay"];
UIImageView *imgView=[[UIImageView alloc]initWithFrame:frameSize];
imgView.image=img;
[_scrPage addSubview:imgView];
[self.view addSubview:_scrPage];
}
please help me how to remove overlay ..
By "overlay" I assume you mean the mean the UIImageView you added the _srcPage? Have you retained some sort of reference to that view? If so, then all you need to do is [imgView removeFromSuperview]; If not, you need to find out how you can get a reference to that specific view.
Related
I can now display a UIImageView that is within an array but using the following:
[[self.guess objectAtIndex:1] setFrame:CGRectMake(20, 20, 100, 100)];
[self.view addSubview:[self.guess objectAtIndex:1]];
If I want to change the image within one of my UIImageViews within the array
I can use:
[self.guess replaceObjectAtIndex:1 withObject:Square];
but I then have to remove the original view, then add the new subview again:
[[self.guess objectAtIndex:1] removeFromSuperview];
[self.view addSubview:[self.guess objectAtIndex:1]];
The trouble is, my new subview does not inherit the frame position and size
of the original image (as this may have changed). Is there a way to do this
more easily?
I was hoping for something like this, that would just update the original
image in the same position, with the same size:
[self.guess.image replaceObjectAtIndex:1 withObject:Square.image];
Thanks again!
Would it be possible to store only the images in the array and just have one UIImageView? Then, just replace the image inside the UIImageView element
What Radu already said, its better to keep an array of images, or imageNames. Then you also do not have to remove the imageView from the superView, you just reuse the one and only one ImageView.
So what you left is something like this
yourImageView.image = [self.guess objectAtIndex:1];
And if you only store the names in the array
yourImageView.image = [UIImage imageNamed:[self.guess objectAtIndex:1]];
I don't if you've tried this yet, but this should work.
UIImageView *img = (UIImageView *)[self.guess objectAtIndex:1];
img.image = Your Image;
I have a Tableview containing cells with images, however the cells that are reused still contain the image from the previous cell that is being reused until the new image is downloaded and set.
I have tried setting the image to nil. (imageV is a subclass of HJManagedImageV, source can be found here: HJManagedImageV
[cell.imageV setImage:nil];
the setter
-(void)setImage:(UIImage *)theImage{
if (theImage==image) {
//when the same image is on the screen multiple times, an image that is alredy set might be set again with the same image.
return;
}
[theImage retain];
[image release];
image = theImage;
[imageView removeFromSuperview];
self.imageView = [[[UIImageView alloc] initWithImage:theImage] autorelease];
[self addSubview:imageView];
[imageView setNeedsLayout];
[self setNeedsLayout];
[loadingWheel stopAnimating];
[loadingWheel removeFromSuperview];
self.loadingWheel = nil;
self.hidden=NO;
if (image!=nil) {
[callbackOnSetImage managedImageSet:self];
}
}
I have a workaround for by setting imageV to hidden but then I lose the loading spinner and I'd really like to know why setting it to nil isn't working.
Anyone have any ideas, cause I'm all out of them. Or am I missing a step somewhere.
Are the cells a subclass of UITableViewCell? If yes, I would try to implement the method prepareForReuse and see if can solve the problem there.
Hope this helps =)
Don't set it to nil, nor hide it.
We use a similar class and what we do for such cases is to set a start image to be displayed until the new image loads.
So in your case you could simply set the image as a blank jpg/png inside your bundle instead of nil
i have my subviews stored in an array...what i want is to place these subviews to my main view from array....
for(int i=0;i<[imageViewArray count];i++)
{
NSLog(#" image array count is %d",[imageViewArray count]);
// countlayers= countlayers+1;
// [canvasView insertSubview:[imageViewArray objectAtIndex:i] atIndex:countlayers];
[canvasView addSubview:[imageViewArray objectAtIndex:i]];
}
can you tell me what i am doing wrong
If imageViewArray really contains initialized views, and if those views already have correct frame attributes, you're doing nothing wrong (even though your code could be more elegant).
Also, of course, we have to make sure that canvasView is indeed initialized and visible on the screen. Try setting its backgroundColor to something noticeable:
canvasView.backgroundColor = [UIColor greenColor];
Once you are sure the canvasView is actually being displayed, I would suggest using fast enumeration, which makes going through the array nicer, and logging your new subviews to make sure their frames are like you want them.
for (UIView *imageView in imageViewArray) //this is fast enumeration. You can get it through code completion by typing forin
{
NSLog(#"%#", imageView); //let's take a look at the imageView. What is its frame?
[canvasView addSubview:imageView];
}
Used enumeration to add images on your canvas View using imageViewArray and probably you are also missing with the setting frame of the images.
for (UIImageView *imageView in imageViewArray) //enumeration.
{
//let's set frame for image view before adding to canvasView
[imageView setFrame:CGRectMake(x,y,w,h)];
//Also make sure imageView has image or not
if(imageView.image)
[canvasView addSubview:imageView];
}
I would like to know the best way/correct way to achieve from following layout? I want to place an UIImageView outside of UITableViewCell in a UITableView with static cells.
I have done the following by subclassing UITableViewCell for the cells in section 1 using the following code
- (void)setFrame:(CGRect)frame {
frame.size.width -= 125.0;
[super setFrame:frame];
}
In the UITableViewController's viewDidLoad I add the UIImageView and position it according to the width of the custom UITableViewCell.
This sort of works, but i'm not sure how to deal with rotation and also if what i've done so far would be the correct way?
there are differnt ways to do it. one is to set the width of table view less as you showd in pic 2nd is to use custom table view cell and on required cell add image so that your cell data as well as image will be shown. i think custom cell would be the better solution. tell me if you are asking the same thing what i answered, if no, then i review my answer thank.
I managed to produce what I wanted using the follow, this is proberly not the best way or cleanest way but as no one from StackOverFlow gave any better suggestions I thought I better answer this.
I subclassed the first 3 UITableViewCells and set a frame size to take into account the size of my image.
- (void)setFrame:(CGRect)frame {
float cellWidth = (frame.size.width - 345);
frame.size.width = cellWidth;
[super setFrame:frame];
}
Then in my UITableViewController's viewDidLoad I create and position the UIImageView using the first static cell in the tableview as an IBOutlet ("firstCell"). I then set the autoResizingMask which sorts out rotation and finally add the UIImageView to the view.
//Create and position the image view
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((firstCell.frame.size.width), (firstCell.frame.origin.y + 70), 300, 137)];
// Add border and round corners of image view to make style look a little like tableviewcells
[imageView.layer setBorderColor:[UIColor colorWithWhite:0 alpha:0.5].CGColor];
[imageView.layer setBorderWidth:2.0];
[imageView.layer setCornerRadius:5.0];
[imageView setClipsToBounds:YES];
//Set the image in the image view
UIImage *image = [UIImage imageNamed:#"defaultPicture.png"];
imageView.image = image;
//Set resizing of image view for when view is rotated
imageView.contentMode = UIViewContentModeRedraw;
imageView.autoresizingMask = UIViewContentModeScaleAspectFit;
//Add tap gesture for imageview to initiate taking picture.
imageView.userInteractionEnabled = YES;
UITapGestureRecognizer *imageViewTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(takePicture:)];
[imageView addGestureRecognizer:imageViewTap];
//Add image view to view
[self.view addSubview:imageView];
This has not been fully tested and i'm sure isn't a great implementation, but its a starting point for the effect i'm after. Please reply if you know of a better way.
Note: The above code is written for my app on the iPad but screenshots are from testing I did on iPhone
How can i remove an ImageView added on a dynamically created UIView, so that i can add another ImageView on my UIView.
You either add a tag for that UIImageView and find it based on tag or loop throughout the subviews and look for an object of class UIImageView containing the image you need to change.
Easiest way is probably with tags. So...
UIImageView *removeMe = [[UIImageView alloc] init];
removeMe.image = [UIImage imageNamed:#"theImage.png"];
removeMe.tag = 1;
[theView addSubview:removeMe];
[removeMe release]; //theView now retains it!
...then later:
UIImageView *removalTarget = (UIImageView *)[theView viewWithTag:1];
[removalTarget removeFromSuperview];