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你能帮我如何在 SLComposeServiceViewController 中自定义取消和发布按钮吗？

我想更改标题和按钮图像。

4

3 回答 3

3

SLComposeServiceViewController自定义 UI 的选项非常有限，目前不包括修改“取消”和“发布”按钮的能力。在当前版本的 iOS 中，避免使用这些按钮的唯一方法是不使用SLComposeServiceViewController. 共享扩展不需要使用该类，并且可以使用完全自定义的 UI。如果这些按钮不合适，那是您唯一的选择。

于 2014-12-22T18:43:44.287 回答
1

我想出了这个解决方案。在最坏的情况下，Apple 会更改并停止使用导航栏，在这种情况下，按钮将简单地恢复为“发布”和“取消”。应该没有崩溃。

对于此示例，我使用“✖”表示取消，使用“✔”表示发布。

- (void) viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    // find the navigation bar
    UINavigationBar* bar = self.navigationController.navigationBar;
    if (bar == nil)
    {
        for (UIView* b in self.view.subviews)
        {
            if ([b isKindOfClass:UINavigationBar.class])
            {
                bar = (UINavigationBar*)b;
                break;
            }
        }
        if (bar == nil)
        {
            return;
        }
    }

    // find the cancel and post buttons, assuming the post button is on the far right which is a common iOS UI design, to put the positive or confirm action on the right
    // also deals with right to left languages (which SLComposeViewController does not support yet), where the post button will be on the left
    UIButton* postButton = nil;
    UIButton* cancelButton = nil;
    BOOL rightToLeft = NO;
    if ([UIView.class respondsToSelector:@selector(userInterfaceLayoutDirectionForSemanticContentAttribute:)])
    {
        rightToLeft = ([UIView userInterfaceLayoutDirectionForSemanticContentAttribute:bar.semanticContentAttribute] == UIUserInterfaceLayoutDirectionRightToLeft);
    }
    CGFloat x = (rightToLeft ? FLT_MAX : FLT_MIN);
    for (UIView* v in bar.subviews)
    {
        if ([v isKindOfClass:UIButton.class] && ((rightToLeft && v.frame.origin.x < x) || (!rightToLeft && v.frame.origin.x > x)))
        {
            x = v.frame.origin.x;
            if (postButton != nil)
            {
                cancelButton = postButton;
            }
            postButton = (UIButton*)v;
        }
    }

    // if we found a cancel UIButton, set the title
    if (cancelButton != nil)
    {
        [cancelButton setTitle:@"✖" forState:UIControlStateNormal];
    }

    // if we found a post UIButton, set the title
    if (postButton != nil)
    {
        [postButton setTitle:@"✔" forState:UIControlStateNormal];
    }
}
于 2015-09-10T16:05:08.367 回答
-1

我刚刚找到了一种方法：

class CustomServiceViewController: SLComposeServiceViewController {
    override func viewDidLoad() {
        let navigationBar = view.subviews.first?.subviews?.last? as? UINavigationBar
        let postButton = navigationBar?.subviews.last? as? UIButton
        let cancelButton = navigationBar?.subviews.last? as? UIButton
        postButton?.setTitle("Done", forState: .Normal)
    }
}

请注意 - 这是一个脆弱的解决方案，基于未记录的内部结构SLComposeServiceViewController

于 2015-01-14T01:21:43.547 回答