ios - 将文本添加到自定义后退按钮 iOS

Question

我的导航 Controller 中有一个带图像的后退按钮，我想将文本设置在图像之上。我试过了，但它似乎没有出现:

    UIImage *normalBackImage = [UIImage imageNamed:@"button_tl.png"];
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom]; backButton.bounds = CGRectMake(0, 0, normalBackImage.size.width, normalBackImage.size.height );
    [backButton setImage:normalBackImage forState:UIControlStateNormal];
    backButton.titleLabel.text = @"Back";

有人知道怎么实现吗？谢谢!

Answer 1

1. 设置标题的颜色，否则你将看不到任何东西:)

   • setTitleColor:forState:

2。不要尝试设置图像(这意味着 FOREGROUND 图像)。而是设置背景图像 :)

– setBackgroundImage:forState:

示例:

UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(10, 10, 100, 50);
[backButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[backButton setTitle:@"Bla" forState:UIControlStateNormal];

UIImage *normalBackImage = [UIImage imageNamed:@"button_tl.png"];
[backButton setBackgroundImage:normalBackImage forState:UIControlStateNormal];

[self.view addSubview:backButton];