Replace a substring with another substring

I want to replace the string "abc" to "def" each time it 开发者_如何学Goappears in my NSString object: "axcd abc amamam dff abc kdj abc"

How do I do that??

Thanks,

Sagiftw

Try stringByReplacingOccurrencesOfString:withString:.

NSString* foo = @"axvc abc amamam dff abc kjd abc";
NSString* bar = [foo stringByReplacingOccurrencesOfString:@"abc" withString:@"def"];
NSLog("%@", bar);

Check out replacing regular expressions