CODEWITHSUNDEEP
iphoneobjective-c
Snowman
Snowman

Reputation: 32091

iPhone letting time pass before executing line

I'm building a basic calculator app for iPhone. I've got all the basics in it, but I'm just tweaking it now. Currently, if I press a digit, then an operation, then another digit and hit =, then the result is displayed. What I want is when I press a digit followed by an operation, I'd like the operation to be displayed on the screen. So here's what I have:

    NSString *operation=[[sender titleLabel] text];
    [display setText:operation];
    double result=[[self brain] performOperation:operation];
    [display setText:[NSString stringWithFormat:@"%g",result]];

And so this code only displays the last line, not the operation. If I comment the last line out however, the operation does display. So I'm thinking if I can let some time pass before the 2nd setText is called, this would solve my problem-unless there is another way?

Upvotes: 1

Views: 82

Answers (2)

keegan3d
keegan3d

Reputation: 11315

You could use performSelector:withObject:afterDelay

[self performSelector:@selector(...) withObject:nil afterDelay:1];

Upvotes: 0

Nickolay Olshevsky
Nickolay Olshevsky

Reputation: 14160

Of course, you are rewriting display with the second setText: call. Why not use:

[display setText:[NSString stringWithFormat:@"%@%g", operation, result]]

Upvotes: 3

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