iOS开发中自定义UINavigationBar上的Item

Question

我想自定义leftBarButtonItem和rightBarButtonItem可是我发现只能自定义一个，另外的一个加上来之后没有反应啊，代码如下
UIImageView *meBtnView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
meBtnView.image = [UIImage imageNamed:@"headIcon"];
meBtnView.layer.masksToBounds = YES;
meBtnView.layer.cornerRadius = 20;
UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didClickMeBtn)];
[meBtnView addGestureRecognizer:tapGR];
UIBarButtonItem *meBtn = [[UIBarButtonItem alloc] initWithCustomView:meBtnView];
self.navigationItem.leftBarButtonItem = meBtn;
另外一个rightbarbuttonitem和这个一样写的话，就不会显示出来，请问有没有大神有解决办法？

Answer 1

iOS中一个UI控件只能被用在一个地方，如果你还想要一个rightbarbuttonitem的话，可以再写一个。可参考以下代码
//leftBarButtonItem
UIButton * backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(0,0,40, 40);
[backButton addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
[backButton setBackgroundImage:[UIImage imageNamed:bgImageName] forState:UIControlStateNormal];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

//rightBarButtonItem
UIButton * cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
cancelButton.frame = CGRectMake(0,0,40, 40);
[cancelButton addTarget:self action:@selector(cancelClick) forControlEvents:UIControlEventTouchUpInside];
[cancelButton setBackgroundImage:[UIImage imageNamed:bgImageName] forState:UIControlStateNormal];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:cancelButton];

就算两个按钮一样，也需要两个控件，另外，可以直接定义为button，不用imageView+gesture，我自己的项目里一般都是像我给的代码这么写的。希望对你有帮助。