iphone - 在自定义按钮上设置文本

Question

我用自定义图像制作了一个自定义按钮。然后我尝试设置它的标题，但它没有工作。这是按钮的代码

- (void)viewDidLoad
{
    UIImage *backButtonImage = [UIImage imageNamed:@"button.png"];
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [backButton setImage:backButtonImage forState:UIControlStateNormal];
    [backButton setTitleColor:[UIColor colorWithRed:0.49 green:0 blue:0 alpha:1] forState:UIControlStateNormal];
    [backButton setTitle:@"DONE" forState:UIControlStateNormal];
    backButton.frame = CGRectMake(0, 0, backButtonImage.size.width, backButtonImage.size.height);
    [backButton addTarget:self action:@selector(goBackOne) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
    self.navigationItem.hidesBackButton = YES;//hide original back button
}

但它仍然看起来像这样

Answer 1

如果您希望图像出现在文本下方，则应使用 backgroundImage 属性：

[backButton setBackgroundImage:backButtonImage forState:UIControlStateNormal];

如果您使用 image 属性，图像会将文本推开（当您想并排显示小图像和文本时，它可以工作）

Answer 2

试试backButton.text = @"DONE"。

编辑：尝试改变这一行
[backButton setTitle:@"DONE" forState:UIControlStateNormal];
：
[backButton setText:@"DONE" forState:UIControlStateNormal];