Question

我已经像这样定制了UIBarButtonItem：

UIButton *loginBtn = [UIButton buttonWithType:UIButtonTypeCustom];
loginBtn.frame = CGRectMake(0, 0, 46.0, 34.0);
[loginBtn setImage:[UIImage imageNamed:@"loginBtn.png"] forState:UIControlStateNormal];
[loginBtn addTarget:self action:@selector(loginPressed:) forControlEvents:UIControlEventTouchUpInside];
[loginBtn setTitle:@"Login" forState:UIControlStateNormal];

UIBarButtonItem *finishedButton = [[UIBarButtonItem alloc] initWithCustomView:loginBtn];

[finishedButton setStyle:UIBarButtonItemStylePlain];
self.navigationItem.rightBarButtonItem = finishedButton;

但是现在我看不到带有“登录”的标题，它在按钮上是空白的，似乎“setTitle：”没有用。谁能告诉我为什么？ THX！

Answer 1

setTitle: 确实有效，您还没有仔细阅读文档。使用setBackgroundImage:代替setImage:，因为后者会覆盖setTitle:，但前者不会（这就是您想要的）。而不是

[loginBtn setImage:[UIImage imageNamed:@"loginBtn.png"] forState:UIControlStateNormal];

写

[loginBtn setBackgroundImage:[UIImage imageNamed:@"loginBtn.png"] forState:UIControlStateNormal];
            ^
            +- background!

你应该没事。

如何自定义自定义UIBarButtonItem的标题

1 个答案: