Question

I am printing debug text to my applications text view with

- (void) updateDebugWindow:(NSString *)text {
[dbgText setText:[NSString stringWithFormat:@"%@%@\r\n",dbgText.text,text]];
}

As you can see, the next line will append to the previous so that I can see what happened in the previous step. This works fine

[self updateDebugWindow:@"Debug info"];

but when it reaches bottom it does not automatically scroll down to show the next line of text, I have to manually scroll it with my finger.

Is there some option in xcode which let the text view automatically follow the text?

Answer 1

Here is your routine re-written:

- (void) updateDebugWindow:(NSString *)text {  
    [dbgText setText:[NSString stringWithFormat:@"%@%@\r\n",dbgText.text,text]];  
    [dbgText scrollRangeToVisible:NSMakeRange([dbgText .text length], 0)];
}

This adds your text, then scrolls to the last “character” in the overall string.