Adding View controllers as subview in Swift

Question

Am trying to build a simple calculator app using swift. I have created two view controller with the basic and advanced options. Earlier in Obj-C used to do this

[[AViewController alloc] initWithNibName:@"nibName" bundle:nil]

In swift I cannot even import my new view controllers. But still I can declare as var aViewController:AViewController? and use it. But I am stuck at loading nib

I tried with AViewController(nibName: "nibname", bundle: nil), but everything results in compiler error Could not find an overload for __conversion that accepts the supplied arguments

Hitendra Solanki · Accepted Answer · 2014-06-18 05:58:43Z

3

Try this one,

AViewController(nibName: "nibname", bundle: NSBundle.mainBundle())

This works perfect for me.

Declaration : SWIFT (UINib Class Reference)

init(nibName name: String!,
      bundle bundleOrNil: NSBundle!) -> UINib

Declaration : SWIFT (UIViewController Class Reference)

init(nibName nibName: String!,
      bundle nibBundle: NSBundle!)

The exclamation mark effectively says, “I know that this optional definitely has a value; please use it.” This is known as forced unwrapping of the optional’s value.

This is the reason, we cannot pass "nil" as second parameter i.e bundle

Cheers..!

edited Jun 18, 2014 at 5:58

answered Jun 17, 2014 at 8:48

Hitendra Solanki

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user88975 · Accepted Answer · 2014-06-17 07:44:13Z

2

Looks like nil was the one causing trouble when I replaced it with NSBundle.mainBundle() it worked.

answered Jun 17, 2014 at 7:44

user88975

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