UITableView not loading data from API call - ios

Question

In my code I have a search bar that when its search button is clicked, it triggers this function here:
func getStocks(ticker: String) {
do {
try Stocks.getStocks(ticker, completion: {stockList in
self.listOfStocks = stockList
print("Stock item is: \n", self.listOfStocks.popLast())
dispatch_async(dispatch_get_main_queue(), {
self.saveStocks(self.listOfStocks.popLast()!)
self.tableView.reloadData()
})
})
} catch {
print("Failed to get stocks")
}
}
The purpose of this function is to go through my API call, get data for the item the user has specified in the search bar, append it to a global list of items while also saving the most recent item in the global list into Core Data. Later on I have a block of code that sets the text cell label and sets it to the name property of my Stock struct:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("stockItem", forIndexPath: indexPath)
if let label:UILabel = cell.textLabel {
label.text = self.listOfStocks[indexPath.row].name
}
return cell
}
I've checked to make sure the reuse identifier is correct so that wouldn't be the issue.

Answer 1

You first need to track down where in your code is the issue. I would follow these steps to do that.
Confirm that your Stocks.getStocks() static function is working correctly and that the api call is returning valid data. You have not supplied code for this.
Check that your data source, in this case self.listOfStocks is being populated with the data from the API call. Set a breakpoint or use a print statement in the getStocks() method.
`
func getStocks(ticker: String) {
do {
try Stocks.getStocks(ticker, completion: {stockList in
if let list = stockList {
self.listOfStocks = list
dispatch_async(dispatch_get_main_queue(), {
if let last = self.listOfStocks.popLast() {
self.saveStocks(last)
}
self.tableView.reloadData()
})
} else {
print("ERROR: stockList is nil!")
}
})
} catch {
print("Failed to get stocks")
}
}
Review your table view delegate and dataSource delegate methods are correctly setup. Below is how I would check my cellForRowAtIndexPath method.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("stockItem", forIndexPath: indexPath)
if let datasource = self.listOfStocks[indexPath.row] {
textLabel.text = datSource.name
} else {
textLabel.text = "Row \(indexPath.row): NOT set!"
}
return cell
}