如何让一个hook方法下新建的Button执行方法

@LuckyGuy wrote:

作为小白，也不知道问题描述的清楚不~请看以下代码：
%hook SBMainScreenAlertWindowViewController

• (void)viewDidLoad
  {
  %orig;
  UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
  UIButton *returnAppBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, keyWindow.frame.size.width, 44)];
  returnAppBtn.backgroundColor = [UIColor greenColor];
  returnAppBtn.alpha = 0.5;
  [returnAppBtn addTarget:self action:@selector(returnApp) forControlEvents:UIControlEventTouchUpInside];
  [keyWindow addSubview:returnAppBtn];
  NSLog(@"iOSRE:test log");

}

%new
- (void)returnApp
{
NSLog(@"iOSRE:test Action");
}

%end
为什么点击Button后returnApp这个方法不能执行呢？ %new不是新建方法么？
grep iOSRE: syslog 没有iOSRE:test Action啊！

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