I have to use UITableViewCellStyle.Subtitle (as it works brilliantly with PFTableViewCell) and I can add a default image through storyboard where there is an option to add an image. This works fine but I want to update this image myself through code. I have the following code:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! SBGestureTableViewCell!
if cell == nil {
cell = SBGestureTableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Cell")
}
// update cell image from default image to questionMark
cell.imageView?.image = UIImage(named: "Question_Mark#2x")
}
However, the image does not update and I am still seeing the default image.
If you are using png images ( since your image name contains #2x), you are missing .png.
If you are using xcassets, then double check the name in the assets.
Also, check console, if you don't have the image name right, it should output it there.
That's all I can get from your code.
Related
I am stuck with a problem. I want to populate a tableview with some text and a profile image that can change i use this function for it.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell: CommonCellView!
cell = self.tableView.dequeueReusableCellWithIdentifier("CommonCellView") as! CommonCellView
cell.nameLabel.text = self.userCollection[indexPath.row].display_name
cell.companyLabel.text = self.userCollection[indexPath.row].user_organisation
cell.profileImage.hnk_setImageFromURL(NSURL(string: self.userCollection[indexPath.row].profile_picture)!)
self.makeImageViewCircular(cell.profileImage.layer, cornerRadius: cell.profileImage.frame.height)
cell.profileImage.clipsToBounds = true
return cell
}
nothing to suprising here. But when i change my own profile picture then i send it to the API and revist this function it shows the cached image. So i tought i might try something a bit diffent why not get all the images for every cell using Alamofire.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell: CommonCellView!
cell = self.tableView.dequeueReusableCellWithIdentifier("CommonCellView") as! CommonCellView
cell.nameLabel.text = self.userCollection[indexPath.row].display_name
cell.companyLabel.text = self.userCollection[indexPath.row].user_organisation
cell.profileImage.image = UIImage()
//getting the cell image
Alamofire.request(.GET, self.userCollection[indexPath.row].profile_picture)
.response {(request, response, avatarData, error) in
let img = UIImage(data: avatarData!)
cell.profileImage.image = img
}
self.makeImageViewCircular(cell.profileImage.layer, cornerRadius: cell.profileImage.frame.height)
cell.profileImage.clipsToBounds = true
return cell
}
this works to a point where user scrolles very fast the image of a different user will be shown until the request gets fulfilled. Okey so make that happen somewere else and use an array for the images. I also tried that. but because its async the images would go into the array in the wrong order. So back to HanekeSwift. I read the documentation and saw i had a cache on disk but i could not clear or delete it.
to clear the cache i also tried:
NSURLCache.sharedURLCache().removeAllCachedResponses()
but i did not do a thing. it works in the Alamofire situation but its not a good solution either.
I want to use hanekeSwift because HanekeSwift is fast enough to get all the images. but i want to clear the cache everytime the contoller loads.
Any suggestions would be appreciated!
Cees
I found a the problem.
First i was running an older version of the pod. So after updating i could use the function.
Shared.imageCache.removeAll()
after you import haneke into the controller.
the final pice of code looked like this.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell: CommonCellView!
cell = self.tableView.dequeueReusableCellWithIdentifier("CommonCellView") as! CommonCellView
cell.nameLabel.text = self.userCollection[indexPath.row].display_name
cell.companyLabel.text = self.userCollection[indexPath.row].user_organisation
cell.profileImage.image = UIImage()
//getting the cell image
cell.profileImage.hnk_setImageFromURL(NSURL(string: self.userCollection[indexPath.row].profile_picture)!)
//deleting it from cache
Shared.imageCache.removeAll()
self.makeImageViewCircular(cell.profileImage.layer, cornerRadius: cell.profileImage.frame.height)
cell.profileImage.clipsToBounds = true
return cell
}
it works now but removing the cache all the time an other cell gets filled seems a bit overkill.
I am trying to make a custom checkbox list using the UITableview that allows single selections (I should however be able to select as many options as I want) and a custom UITableCell.
My custom cell contains a Label and an ImageView and all I want is to change the image contained in the IV on tap.
I am able to change the image from unchecked to checked in my didSelectRowAtIndexPath without a problem but I am having problems changing it back from checked to unchecked.
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
print("tableView -> didSelectRowAtIndexPath")
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! CustomCellVC
cell.backgroundColor = UIColor.clearColor()
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
}
I tried to play with the highlighted state of the ImageView by adding the checkedbox image as the highlighted image and then turning it on and off but it only enters the if but ignores the if else if clicked again
if(cell.ivCellImage.highlighted == false)
{
print("Highligth is OFF")
cell.ivCellImage.highlighted = true
}
else if(cell.ivCellImage.highlighted == true)
{
print("Highligth is ON")
cell.ivCellImage.highlighted = false
}
as well as checking what image is inside the IV, this if-else block being completely ignored
if(cell.ivRiskCellImage.image!.isEqual(UIImage(named: "UncheckedBox")))
{
print("Is unchecked!")
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
}
else if(cell.ivRiskCellImage.image!.isEqual(UIImage(named: "CheckedBox")))
{
print("Is checked!")
cell.ivRiskCellImage.image = UIImage(named: "UnheckedBox")
}
Moreover, when I manage to display the checkedbox image on click I get something like this
while if I try setting the checked box for all the cells in cellForRowAtIndexPath by adding this
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
the checkbox tick is no longer semitransparent but white, as it should be
Any ideas? I spent quite some time trying to solve this without any luck.
Instead of let cell = tableView.dequeueReusableCellWithIdentifier... I would use
let cell = tableView.cellForRowAtIndexPath(indexPath) as! CustomCellVC
This way you get a reference to the cell you want to change the image in. tableView.dequeueReusableCellWithIdentifier is meant to be used in delegate method tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) when you want to recycle your cells for better performance.
Also cell.ivRiskCellImage.image!.isEqual(UIImage(named: "UncheckedBox")) doesn't work, because UIImage(named: "UncheckedBox") creates a new UIImage, which isn't the same as the UIImage you want to check it against.
As fat i understand that you want to change image form Check and Uncheck and vice versa
There is mainly two methods of table view delegate
– tableView:didDeselectRowAtIndexPath:
– tableView:didSelectRowAtIndexPath:
reference link : https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITableViewDelegate_Protocol/#//apple_ref/occ/intfm/UITableViewDelegate/tableView:didDeselectRowAtIndexPath:
Although you can do same thing in – tableView:didDeselectRowAtIndexPath:
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath)
{
print("tableView -> didSelectRowAtIndexPath")
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! CustomCellVC
cell.backgroundColor = UIColor.clearColor()
cell.ivRiskCellImage.image = UIImage(named: "**unCheckedBox**")
}
I make a network call in ViewDidLoad to get objects (first 25), then I make another call in willDisplayCell to get the rest of the objects. I'm Using PINReMoteImage in the code below. It works, but the problem is that as you scroll through the collection view, a cell will have one picture then another picture will appear over it. How can I improve this UI? I thought updateWithProgress was supposed to deal with this by using a blur until the image is loaded but it doesn't seem to be working?
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! PinCollectionViewCell
if let pinImageURL = self.pins[indexPath.row].largestImage().url {
cell.pinImage?.pin_updateWithProgress = true
cell.pinImage?.pin_setImageFromURL(pinImageURL, completion: ({ (result : PINRemoteImageManagerResult) -> Void in
if let image = result.image {
self.imageArray.append(image)
}
}))
}
The problem is that I'm reusing cells, but I wasn't resetting the image. So I simply added cell.pinImage?.image = nil to the above. Once I found out that was the problem I added an UIActivityViewIndicatorViewto the cell and stop it when the image comes in.
I'm trying to display an icon for each PFTableViewCell based on the imageView property which doesn't work. The code I'm using is below which throws the follow error, "fatal error: unexpectedly found nil while unwrapping an Optional value".
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject) -> PFTableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! i!
if cell == nil {
cell = PFTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")
}
cell.textLabel?.text = "Some Label"
cell.detailTextLabel?.text = "Another label"
cell.imageView.image = UIImage(named: "icon.png")
return cell
}
I had the same issue. Your crash is linked to the imageView being nil.
I guess this is a bug with PFTableViewCell: it does not "see" the standard imageView from the "Basic" style, and cannot create the corresponding PFImageView (I opened an issue with ParseUI).
Generally speaking, it's better to set your line like so:
cell.imageview?.image
then you won't have the crash.
You won't have the image either, but that's because of Parse's PFTableViewCell ...
If you want your code to work, you need to create a custom cell, with an imageView that you need to set as a PFImageView. This way, there will indeed be an imageView, and the whole PFTableViewCell file loading works perfectly.
I'm using Parse. I have a column in my table to store images as PFFiles. I am using a PFQueryTableViewController. I want to display images in my Parse table's "image" column as thumbnails for each table view cell that has an image associated with it.
Here is the relevant cellForRowAtIndexPath code I'm suspicious of:
override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!, object: PFObject!) -> PFTableViewCell! {
let cell = tableView.dequeueReusableCellWithIdentifier("ListingCell", forIndexPath: indexPath) as PFTableViewCell
// This works as you can see "grapes" displayed on the screenshot I added.
var label = cell.viewWithTag(2) as UILabel
label.text = object["title"] as? String
// Accessing the PFImageView within my custom PFTableViewCell via a tag
let imageView = cell.viewWithTag(3) as PFImageView
// Extracting the image stored as a PFFile stored in the database
imageView.file = object["image"] as? PFFile // remote image
// Setting the actual thumbnail with the image when loaded
imageView.loadInBackground { (image: UIImage!, error: NSError!) -> Void in
imageView.image = image
}
return cell
}
I have 2 records stored in this Parse table, the first does not have an image and the second one does (hence why the "grapes" cell is empty). My question is, why is the image not displaying in the thumbnail (properly constrained) I created and rather taking up the entire screen? What am I doing wrong here? The even weirder part is that I used Xcode's view debugging to capture the view hierarchy and it shows it properly placed within the thumbnail. Any ideas?
You need to make sure your image mode is set to something like "Scale To Fill".