I am using SDWebImage in my swift 3.0.1 project with xcode 8.1.
I am able to get the image downloaded from a remote url and show in the image view of dynamic cell of the tableview.
The problem occurs when I scroll up in the tableview, the images get shrink.
I used this code and its working for me.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cellId:String = "cellid"
let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! customcell
let strUrlProfilepic = your image url path
self.yourImageView.af_setImage(withURL: strUrlProfilepic, placeholderImage: UIImage(named: "PlaceholderImage.jpeg"))
return cell
}
Related
I would like the selected cell to be pinned to the Tableview top and stay there while scrolling like section header when .plain style is used but for cell.
I don't know how to approach the problem. I know that the code should be placed at didSelectRowAt.
If your tableView cells are static, and you want the selected cell to be displayed at the top, You should try:
optional func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedRow = tableView.cellForRow(at: indexPath) as! yourTableViewCell // this wont apply if your cells are static
let firstVisibleIndexPath = tableView.indexPathsForVisibleRows.first
tableView.moveRow(at: indexPath, to: firstVisibleIndexPath)
}
I have a table in swift. Whenever I scroll up and down the tableview it runs the getImageForCell function again even though the image has already been loaded. Is there a way for this not to happen. Below is my code.
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ReviewTableViewCell", for: indexPath) as! ReviewTableViewCell
let review = json[reviewType][indexPath.row]
cell.nameLabel.text = review[userType]["name"].stringValue
cell.reviewLabel.text = review["message"].stringValue
cell.dateLabel.text = review["created_at"].stringValue
cell.ratingStars.rating = Double(review["rating"].intValue)
getImageForCell(url: review[userType]["photo_url"].stringValue, cell: cell)
return cell
}
func getImageForCell(url: String, cell: ReviewTableViewCell) {
Alamofire.request(url).responseImage { response in
if let downloadedImage = response.result.value {
print("downloaded image \(downloadedImage)")
DispatchQueue.main.async {
cell.profileImageView.image = downloadedImage
}
}
}
}
This is due to both not cacheing the image, and also not reusing the cell - in your view you are recreating the cell each time - this would not specifically fix the image issue, but will improve performance. My favourite cache image extension is kingfisher (no affiliation), although alamofire can be used to cache images too.
https://github.com/onevcat/Kingfisher
I am totally new to Swift and also have no background experience in development. I am trying to a simply table view in Swift but keep getting the error 'Editor placeholder in source file.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: <#T##IndexPath#>) as! CustomCell
cell.photo.image = images[indexPath.row]
cell.Name.text = names[indexPath.row]
cell.Job.text = jobs[indexPath.row]
return cell
}
This is where your problem is:
for: <#T##IndexPath#>)
just tab to that variable and type in:
indexPath
I am having a hard time preventing color change on my background color for my IBAction button when I select a row in my tableView. The background of my button is set to green, but when I tap the table view cell, it becomes gray. I have tried to change the color through different functions (tableView didSelectRowAtIndexPath etc..). Any ideas on how I would prevent the background of the button to change?
Thanks in advance!
I have faced same problem with button backgroundColor in TableView and solved it this way.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! CustomCell
cell.button.backgroundColor = UIColor.greenColor()
}
If you want to disable color change on selection entirely, change the selectionStyle attribute in your custom cell:
selectionStyle = .none
I solved the problem with the code Nirav provided me above:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! CustomCell
cell.button.backgroundColor = UIColor.green
}
However, I noticed that the button background color continued to turn gray when I tapped the row, and held the 'tap' without releasing. I solved this by adding the following code as well:
func tableView(_ tableView: UITableView, didHighlightRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! CustomCell
cell.exploreButton.backgroundColor = UIColor.green
}
So I have been stuck on this for a day or so. How do I change the color of an UIImage color when tapping on a tableview cell? So for example I have a black image and when I tap a tableview cell it changes that image to white? Thank you!
I tried using this code but I do not know how to implement it right!
let theImageView = UIImageView(image: UIImage(named:"foo")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate))
theImageView.tintColor = UIColor.redColor()
It looks like you have the right pieces but don't know where to call them. You will assign the image to the image view in your cellForRowAt: method.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier, for: indexPath)
cell.imageView.image = UIImage(named:"foo")!.withRenderingMode(.alwaysTemplate)
return cell
}
Then you will change the tint color of the image view in the didSelect delegate method.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.imageView.tintColor = newColor
}
}