Swift : How to get the string before a certain character?

Question

How do I get the string before a certain character in swift? The code below is how I did it in Objective C, but can't seem to perform the same task in Swift. Any tips or suggestions on how to achieve this? rangeOfString seems to not work at all in swift (although Swift has been acting up for me again).

NSRange range = [time rangeOfString:@" "]; NSString *startDate = [time substringToIndex:range.location]; 

As you can see from the code above I am able to get the string before the space character in Objective C.

Edit : If I try something like this

 var string = "hello Swift"  var range : NSRange = string.rangeOfString("Swift") 

I get the following error.

Cannot convert the expression's type 'NSString' to type '(String, options: NSStringCompareOptions, range: Range?, locale: NSLocale?)'

Not sure what I did wrong exactly or how to resolve it correctly.

Answer 1

Use componentsSeparatedByString() as shown below:

var delimiter = " " var newstr = "token0 token1 token2 token3" var token = newstr.components(separatedBy: delimiter) print (token[0]) 

Or to use your specific case:

var delimiter = " token1" var newstr = "token0 token1 token2 token3" var token = newstr.components(separatedBy: delimiter) print (token[0])