UITableview: failed to obtain a cell from its dataSource

问题

I get this error message: failed to obtain a cell from its dataSource

The strange that

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

not even get called, problem is not that returned cell is nil. I put in breakpoints. cellForRowAtnot get called.

numberOfRowsInSection returns value.

I do not know it is relating or not, but now I do not use UITableViewController, I just have a UIViewController, and it is the datasource and delegate for the UITableView. I hope it can not cause interfere. Any idea?

回答1:

Cross check below check list:-

• it's because you are failing to dequeue a reusable cell.
  • The problem is that your cellForRowAtIndexPath function is embedded in another function
  • when you forgot to add the UITableViewDataSource and UITableViewDelegate protocols to the ViewController declaration.

class DataViewController: UIViewController, UITableViewDataSource, UITableViewDelegate

回答2:

I guess this is your problem - Failed to obtain a cell from its DataSource

you can take a look at: https://www.hackingwithswift.com/example-code/uikit/fixing-failed-to-obtain-a-cell-from-its-datasource

try something like this:

cell = tableView.dequeueReusableCellWithIdentifier(getCellIdentifierForType(cellType))
        setDataToCell(cell, item: item)

good luck

来源：https://stackoverflow.com/questions/39902614/uitableview-failed-to-obtain-a-cell-from-its-datasource