如何解决 uiTableview 滚动应用程序崩溃，它在 swift 中引发数组索引超出范围异常？

Question

I am loading data and updating the cell, when I scroll quickly the app crashes and throws array index out of bound at cellforrowat: index path. How do I overcome this problem?

Answer 1

Your tableView is trying to access data from your data source which actually does not exist.

Assuming you have a data source like this.

let dataSource = [[String]]()

Then your table view delegate methods should look like this.

func numberOfSections(in tableView: UITableView) -> Int {
     return dataSource.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
     return dataSource[section].count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let data = dataSource[indexPath.section][indexPath.row]
     
   //your code     
}