syh1234

_imgView.image = [UIImage imageNamed:@"123"]; _imgView.alpha = 0.0; - (IBAction)dan...

syh1234

AppDelegate.m #import "AppDelegate.h" #import "ViewController.h" #import "FirstViewCont...

syh1234

AppDelegate.m #import "AppDelegate.h" #import "ViewController.h" #import "SecondViewCon...