IOS Objective-c Learning Note control gets the button call

There are two ways to get control:

1. Iboutlet: Directly drag and drop the required controls to the interface design file *.h between @interface and @end

2. Tag: Set tag to 12, get lable by the following code

uilabel* lable = (uilabel*) [Self.view viewwithtag:];

The call to the button, and also for iOS, is handled in two ways:

1. Implementing event handling via Ibaction bindings

is still a drag control to *.h, enter the Ibaction method name, connect! And within the control interface *.M file implementation:

-(Ibaction) MYBTN2: (ID) sender {    [self.mytxt setText:@ "aaa"];}

2. Setting events through code

The reference is first obtained by getting the two methods of the control, and then in the-(void) Viewdidload:

[Self.mybtn addtarget:self Action: @selector (Btnhandler:) forcontrolevents:uicontroleventtouchupinside];

And new method Btnhandler:

-(void) Btnhandler: (UIButton *) sender{    [self.mytxt setText:@ " Yes, that's right . " ];}

IOS Objective-c Learning Note control gets the button call