I have an Objective-C statement, who can help me translate into Swift?

Question

[self.resultController setCellForRowAtIndexPathCompletion:^UITableViewCell *(UITableView *tableView, NSIndexPath *indexPath) {

}];

This function is defined as follows:

@property (copy) UITableViewCell * (^cellForRowAtIndexPathCompletion)(UITableView *tableView, NSIndexPath *indexPath);

That's called a "Block" in Objective-C and a "Closure" in Swift in case you were looking for "key word" to improve your search. — Larme, Sep 01 '17 at 12:53

score 1 · Answer 1 · answered Sep 01 '17 at 12:54

1

This is a closure that can be defined like this:

var cellForRowAtIndexPathCompletion: ((_ tableView: UITableView, _ indexPath: IndexPath) -> UITableViewCell)!

answered Sep 01 '17 at 12:54

Tamás Sengel

I use it like this:self.resultController.cellForRowAtIndexPathCompletion ((tableView: UITableView, indexPath: IndexPath) -> UITableViewCell)!{ } but have a error : Cannot convert value of type '((UITableView, IndexPath) -> UITableViewCell).Type' to expected argument type '(UITableView?, IndexPath?)' (aka '(Optional, Optional)') – ZureaintC Sep 01 '17 at 13:05
You should not use a forced unwrapp (!) on a property unless you are 100% sure it will always be set, or even better, unless it is a IBOutlet – Daniel Sep 01 '17 at 13:24
How should I code? – ZureaintC Sep 01 '17 at 13:30

1 Answers1