Swift if let

Essentially the line is saying, "if you can let the new variable name equal the non-optional version of optionalName, do the following with it". As Martin pointed out, this is called Optional Binding.

The sole purpose of it is to test if an optional variable contains an actual value and bind the non-optional form to a temporary variable. This is the safe way to "unwrap" an optional or in other words, access the value contained in the optional. It is in no way testing for equality of any kind. It is only testing for the existence of a value within an optional.

Similar codes

0 vote429 views1 answer
Swift lazy property
Swift
0 vote401 views1 answer
Cifilter image preserve orientation
Swift
0 vote475 views2 answers
Update parent vc from child controller swift 5
Swift
0 vote381 views1 answer
Undefined symbol __swift_force_load_$swift webkit react native
Swift
0 vote392 views1 answer
Swift 5 flatMap wtih keypath
Swift
0 vote408 views2 answers
Abstract classes in Swift
Swift
-1 vote426 views2 answers
Transform string to url swift
Swift
2 votes424 views1 answer
Swift share with
Swift
1 vote414 views1 answer
Swift scroll to tableviewcell
Swift
2 votes392 views1 answer
Swift firebase read key in autoKey
Swift