ObjC to Swift : [NSString enumerateLinesUsingBlock:]

Objective-C

[nsString enumerateLinesUsingBlock: ^( NSString * line,
                                       BOOL * stop )
{
	//  do something with "NSString * line" line by line
}];

Swift

string.enumerateLines
{ line, stop in

	//  do something with "line: String" line by line
}