iphone - iOS Root View Controller's viewDidAppear: called while splash screen (Default.png) still on screen -

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in ios app want run series of operations in root view controller after has appeared on screen. however, seems ios app calling viewdidappear while splash screen (i.e. showing default.png image) still on screen , before root view controller laid out on screen. i've tried same code in viewdidload well, , had same problem. how can force code run once root view controller on-screen?

in viewdidload use 

[self performselector:@selector(loaddata) withobject:nil afterdelay:.5];

and use code inside loaddata method...


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