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Old 09-09-2011, 03:57 PM   #1 (permalink)
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Default Can't remove a UIImage

Hello

I have an if else statement

in the if part I have this

UIImageView *image1 = [[UIImageView alloc]
initWithImage:[UIImage imageNamed:@"1.png"]];
[self.view addSubview:image1];

it works great

the problem is with the else statement

why can't I use the image1 to do something like

image1.hidden = YES;

It says image1 is not declared but its in the same function?
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Old 09-09-2011, 04:04 PM   #2 (permalink)
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You need to learn the scope of variables in C. Declare the imageview outside the (before) the IF block. See: http://en.wikipedia.org/wiki/Scope_(computer_science) and http://aelinik.free.fr/c/ch14.htm
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Old 09-09-2011, 04:16 PM   #3 (permalink)
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oh that makes perfect sense, thank you.
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Old 09-09-2011, 04:17 PM   #4 (permalink)
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random question,

how can I do this

I have an activity indicator that will show for a second and go away but I want to it show for 5 seconds then disappear, I tried using sleep() but that didnt help.
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Old 09-09-2011, 04:19 PM   #5 (permalink)
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Schedule an NSTimer that will trigger in 5 seconds and remove the indicator.
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