uinavigationcontroller - navigationController!.pushViewController vs. presentViewController in iOS Swift -

what implications of pushing viewcontroller in uinavigation vs. presenting viewcontroller modally in terms of changing values in next view?

for example, why first work not second?

first:

var textcontroller: textviewcontroller textcontroller = self.storyboard!.instantiateviewcontrollerwithidentifier("textviewcontroller") as! textviewcontroller presentviewcontroller(textcontroller, animated: false, completion: nil) textcontroller.textdetail.text = categories[indexpath.row] 

second:

var textcontroller: textviewcontroller textcontroller = self.storyboard!.instantiateviewcontrollerwithidentifier("textviewcontroller") as! textviewcontroller self.navigationcontroller!.pushviewcontroller(textcontroller,animated:true) textcontroller.textdetail.text = categories[indexpath.row] 

i can't label's value change when pushing in navigation stack.

it appears though when calling presentviewcontroller method, view of view controller loaded during call, whereas when calling pushviewcontroller on navigation controller, view loaded after call.

you can test printing console before , after presenting/pushing view controller, , printing console in textviewcontroller's viewdidload method.

the view needs loaded textdetail variable load (you haven't said so, i'm assuming iboutlet) , textdetail variable needs load able modify text property.

to use pushviewcontroller example set variable on textviewcontroller class, , override viewdidload method, set text property on textdetail variable.