Top "Optional-variables" questions

Downcasting optionals in Swift: as? Type, or as! Type?

Given the following in Swift: var optionalString: String? let dict = NSDictionary() What is the practical difference between the following two …

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swift optional downcast optional-variables
Multiple optional parameters calling function

Assume that i have a function like this below It takes 3 parameters and 2 have optional values private void myfunc (int …

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c# function optional-parameters optional-arguments optional-variables
How to check if imageView is not nil in swift?

I have a fatal error while unwrapping an optional value in swift. I have a profile ViewController with a background …

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ios swift optional-variables