I need help. How come this does not work:
NSProcessInfo *process = [NSProcessInfo processInfo];
NSString *processName = [process processName];
int processId = [process processIdentifier];
NSString *processString = [NSString stringWithFormat:@"Process Name: @% Process ID: %f", processName, processId];
NSLog(processString);
But this does:
NSLog(@"Process Name: %@ Process ID: %d", [[NSProcessInfo processInfo] processName], [[NSProcessInfo processInfo] processIdentifier]);
%@: Output the string form of an object (including NSString).%f: Output a floating point number (float)%d: Output an integral number (int)%x: Output hexadecimal form of a numberYour original NSString:stringWithFormat: had two issues:
@% should be %@ to output an NSString.%f instead of %d to output an int.
Your format string is bad: processId is an int not a float.
Use -Wformat to get rid of this kind of errors.
Your format contains an error, you've swapped the @ and % for the [NSString stringWithFormat:]. It will work for the log but not for the string creation, because the format is %@ not @%.
