The following code produces a runtime error and I can't figure out how. Any thoughts?
var foo: IndexPath
foo = IndexPath()
foo.row = 1
var i = 0
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1 Answer
There is a preCondition in swift to access row of indexpath
/// The section of this index path, when used with `UITableView`.
///
/// - precondition: The index path must have exactly two elements.
public var section: Int
/// The row of this index path, when used with `UITableView`.
///
/// - precondition: The index path must have exactly two elements.
public var row: Int
If you want to access or change row you need to initialise indexPath with row and section
var foo: IndexPath
foo = IndexPath(row: 0, section: 0)
foo.row = 1 // return foo (1,0)
2 Comments
Hortitude
How were you able to step into the IndexPath source? When I try to step in I don't get the nice source view that you get.
Hortitude
when I do that, I just get assembly code: libswiftUIKit.dylib`merged (extension in UIKit):Foundation.IndexPath.section.setter : Swift.Int: 0x1022b22c0 <+0>: pushq %rbp 0x1022b22c1 <+1>: movq %rsp, %rbp