The first IOS Program

1. Fast texture:

2. Core Knowledge

(1)

StatementCode:

@ Property (strong, nonatomic) iboutlet uilabel * useroutput;
@ Property (strong, nonatomic) iboutlet uitextfield * userinput;

-(Ibaction) setoutput :( ID) sender;

Implementation Code:

@ Synthesize useroutput;
@ Synthesize userinput;

Void) viewdidunload

{
[Self setuseroutput: Nil]; // important knowledge point. Release the memory !!!
[Self setuserinput: Nil]; //
[Super viewdidunload];
// Release any retained subviews of the main view.
}

-(Ibaction) setoutput :( ID) sender {
Self. useroutput. Text = self. userinput. Text; // method of vertex Language
// [[Self useroutput] settext: [[self userinput] text]; // call the classic method
}

(2)

It can be implemented through code or interface builder Editor, mainly through the latter method.