自动填充NSString中的空白

Question

如何以编程方式转换：

@"This is any NSString with some blanks"

到此？

@"This+is+any+NSString+with+some+blanks"`

Answer 1

NSString *firstString = @"This is any NSString with some blanks";
NSString *secondString = [firstString stringByReplacingOccurrencesOfString:@" " withString:@"+"];