Question

我在导航栏中添加了以下内容来自定义我的后退按钮，但图像只是重叠/重复：

http://i.stack.imgur.com/eyzJC.png

- (void)viewWillAppear:(BOOL)animated
{
    //take out the label following the button
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc]initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

    //set image for back button
    [[UINavigationBar appearance] setBackIndicatorImage:[UIImage  imageNamed:@"backButtonImage.png"]];
    [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"backButtonImage.png"]];

    self.navigationItem.backBarButtonItem = backButton;
}

它应该是一个朝向左侧的黑色箭头的图像。

在它工作正常之前，但现在它在我模拟它时会这样做。任何见解和帮助将不胜感激。

谢谢

Answer 1

这应该适合你。

UIButton *back = [UIButton buttonWithType:UIButtonTypeCustom];
back.frame = CGRectMake(0, 0, 50, 44);
back.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
[back addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
[back setImage:[UIImage imageNamed:@"backButtonImage.png"] forState:UIControlStateNormal];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView: back];

添加功能：

-(void) back
{
    [self.navigationController popViewControllerAnimated:YES];
}

Answer 2

添加此代码

[UINavigationBar appearance].barTintColor = [UIColor colorWithWhite:1.00 alpha:1];

它应该可以解决你的问题。

为什么我的自定义导航栏后退按钮重叠/重复（Xcode 7.0）？

2 个答案: