UIBarButtonItem *closeBtn = [[UIBarButtonItemalloc] initWithTitle:@"关闭"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(closeAction)];
UIBarButtonItem *backBtn = [[UIBarButtonItemalloc] initWithTitle:@"返回"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(goBackAction)];
[self.navigationItemsetLeftBarButtonItems:[NSArrayarrayWithObjects: backBtn,closeBtn ,nil]];