在Swift中将String数组转换为CGFloat数组

Question

Here is my String array:

let StringArray = ["1.4", "75.3", "23.4"]

And i wan't to convert this String Array to a CGFloat Array how can i do that?

Answer 1

The easiest way is to use map to transform each element from one type to another type:

let doubleArray = StringArray.map {
    CGFloat(($0 as NSString).doubleValue)
}

The cast to NSString is needed because there's no string to double conversion in plain swift - at least I am not aware of any.