UILabel not getting what I write to it - ios

Question

Tricky to write the subject to this. I guess this is a basic question but I can't seem to find the answer.
The code itself shows what I wanna do and the UILabel don't show anything, the first line I add to it works fine, but not when I try to write out the array:
-(IBAction)getSongHistory:(id)sender {
[historyLabel setText:#"test write\n test write another line"];
NSArray *pastMusicArray = [pastSongs getHistory];
for(int t=2; t<[pastMusicArray count]; t++) {
NSString *tempRow = [pastMusicArray objectAtIndex:t];
//NSLog(#"%#", tempRow);
[historyLabel setText:tempRow];
[historyLabel setText:#"\n"];
}
}
The NSLog do put out the right stuff.
What is gong on here, that I am not seeing?

Answer 1

Seems to me that the problem is that you are setting the full text each time and the last setText: is with #"\n" which is an invisible string. Try appending instead of setting the text. Something like:
historyLabel.text = [NSString stringWithFormat:#"%#%#", historyLabel.text,#"TextToAppend"];
This will append #"TextToAppend" to the current text value in the label.
Update: Notice I'm using the text property rather than the setter.
historyLabel.text = #"Some Text";
is equivalent to
[historyLabel setText:#"Some Text"];

Answer 2

Using \n in a string should be fine, try to set numberOfLines property of the label to 0, which allow any number of lines in it.

Answer 3

This is the solution for my own problem. Hope that it can help someone else.
NSArray *pastMusicArray = [pastSongs getHistory];
musicHistory = [[NSMutableString alloc] init];
historyLabel.numberOfLines = 0;
for(int t=2; t<[pastMusicArray count]; t++) {
[musicHistory appendString:[[pastMusicArray objectAtIndex:t] capitalizedString]];
[musicHistory appendString:#"\n"];
}
historyLabel.text = musicHistory;