How to append a string to NSMutableString

Question

i\'m an absolute newbie with objective-c

with this code

NSMutableString *teststring;
[teststring appendString:@\"hey\"];
NSLog(teststring);
         


        

Answer 1

This line

NSMutableString *teststring;

simply establishes a pointer, but does not create anything. Instead, you need to create a new instance of NSMutableString, for example:

NSMutableString *teststring = [[NSMutableString alloc] init];
[teststring appendString:@"hey"];
NSLog("%@", teststring);