如何将自定义 activity 添加到 SFSafariViewController？

Question

我想将自定义 activity (UIActivity) 添加到我在我的应用程序中显示的 SFSafariViewController。我该怎么做？

Answer 1

1。创建 UIActivity.

的子类

实施所有 required methods of the class, and when initializing the activity, pass in the URL of the page at that point and initialize your UIViewController, as prepareWithActivityItems: isn't called within the SFSafariViewController context (rdar://24138390)。如果您的 activity 不显示 UI，而是在初始化期间保存 URL，以便您可以在用户点击操作时处理它。

完整示例：

@interface YourActivity : UIActivity {
    UIViewController *activityViewController;
}
- (id)initWithURL:(NSURL *)url;
@end


@implementation YourActivity

- (id)initWithURL:(NSURL *)url
{
    self = [super init];
    if (self)
    {
        [self prepareWithURL:url];
    }
    return self;
}

- (NSString *)activityType
{
    return @"YourTypeName";
}

- (NSString *)activityTitle
{
    return @"Perform Action";
}

- (UIImage *)activityImage
{
    return [UIImage imageNamed:@"YourActionIcon"];
}

- (BOOL)canPerformWithActivityItems:(NSArray *)activityItems
{
    return YES;
}

- (void)prepareWithActivityItems:(NSArray *)activityItems
{
    NSURL* url = nil;
    for (NSObject* obj in activityItems)
    {
        if ([obj isKindOfClass:[NSURL class]])
        {
            url = (NSURL*)obj;
        }
    }
    
    [self prepareWithURL:url];
}

- (void) prepareWithURL:(NSURL*)url
{
    // initialize your UI using the given URL
    activityViewController = ... // initialize your UI here
}

- (UIViewController *)activityViewController
{
    return activityViewController;
}

+ (UIActivityCategory)activityCategory
{
    return UIActivityCategoryShare;
}


@end

2。将 UIActivity 添加到 SFSafariViewController

在您的 SFSafariViewControllerDelegate 中执行以下方法，它会初始化 activity 并传入用户正在查看的页面的 URL。

- (NSArray<UIActivity *> *)safariViewController:(SFSafariViewController *)controller
                            activityItemsForURL:(NSURL *)URL
                                          title:(NSString *)title
{
    YourActivity* activity = [[YourActivity alloc] initWithURL:URL];
    return @[activity];
}