摘要：
第一种：UIImage *searchimage=[UIImage imageNamed:@"search.png"]; UIBarButtonItem *barbtn=[[[UIBarButtonItem alloc] initWithImage:nil style:UIBarButtonItemStyleDone target:self action:@selector(searchprogram)] autoRelease]; barbtn.image=searchimage; self.navigationItem.rightBarButtonItem=barbtn 阅读全文