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 vote144 views1 answer
Remove child from scene swift
Swift
0 vote152 views1 answer
Swift loop site:stackoverflow.com
Swift
0 vote145 views1 answer
Does swift language requires mac os system
Swift
0 vote203 views2 answers
Swift push view controller
Swift
1 vote151 views1 answer
Swift remove tableview cell
Swift
0 vote135 views1 answer
Swift how to append an element
Swift
1 vote134 views1 answer
Changing color of background swift
Swift
0 vote156 views1 answer
Check enumatted arrray last item swift
Swift
0 vote165 views1 answer
Swift uibutton text resets to default
Swift
0 vote130 views1 answer
Ios get notification payload
Swift