iOS 通过UIActivityViewController实现更多分享服务

iOS  通过UIActivityViewController实现更多分享服务

初始化

接着我们在Button的触发方法里面开始操作UIActivityViewController来提供服务。首先，我们需要初始化一个UIActivityViewController的实例，UIActivityViewController提供了一个初始化方法：

- (instancetype)initWithActivityItems:(NSArray *)activityItems applicationActivities:(nullable NSArray<__kindof UIActivity *> *)applicationActivities NS_DESIGNATED_INITIALIZER;

excludedActivityTypes

UIActivityViewController相比于UIDocumentInteractionController优势除了可以添加额外的自定义服务，它还提供了非常好的原生服务的定制化功能。我们可以完全根据自己的需求，控制UIActivityViewController提供的系统服务的显示，比如我不想展示AirDrop这个功能，而这点在UIDocumentInteractionController是做不到的。想做到这一点，就需要使用到UIActivityViewController提供的一个属性:

@property(nullable, nonatomic, copy) NSArray<NSString *> *excludedActivityTypes; // default is nil. activity types listed will not be displayed

正如注释中提到的，excludedActivityTypes这个属性包含了所有不想在UIActivityViewController中展示的Item服务。excludedActivityTypes是一个字符串数组，所包含的内容必须是系统提供的UIActivity的activityType字符串，而系统提供的字符串如下：

NSString *const UIActivityTypePostToFacebook;
NSString *const UIActivityTypePostToTwitter;
NSString *const UIActivityTypePostToWeibo;
NSString *const UIActivityTypeMessage;
NSString *const UIActivityTypeMail;
NSString *const UIActivityTypePrint;
NSString *const UIActivityTypeCopyToPasteboard;
NSString *const UIActivityTypeAssignToContact;
NSString *const UIActivityTypeSaveToCameraRoll;
NSString *const UIActivityTypeAddToReadingList;
NSString *const UIActivityTypePostToFlickr;
NSString *const UIActivityTypePostToVimeo;
NSString *const UIActivityTypePostToTencentWeibo;
NSString *const UIActivityTypeAirDrop;

如果我们不想展示AirDrop功能，我们把UIActivityTypeAirDrop添加到excludedActivityTypes里面：

activity.excludedActivityTypes = @[UIActivityTypeAirDrop];

#import "UIViewController+Extension.h"

//#import "DZNPolyActivity.h"

@implementation UIViewController (Extension)

+ (UIViewController* )topViewController {

    UIViewController* vc = [[[[UIApplication sharedApplication] delegate] window] rootViewController];

    

    while (1) {

        if ([vc isKindOfClass:[UINavigationController class]]) {

            vc = [(UINavigationController* )vc topViewController];

            continue;

        } else if ([vc isKindOfClass:[RESideMenu class]]) {

            vc = [(RESideMenu* )vc contentViewController];

            continue;

        }

        break;

    }

    return vc;

}

+ (void)showActivityWithURL:(NSURL* )url completion:(void (^)(void))completion {

    [[self topViewController] showActivityWithURL:url completion:completion];

}

- (void)showActivityWithURL:(NSURL* )url completion:(void (^)(void))completion {

    if (url) {

        NSArray* activityItems = @[url];

        

        UIActivityViewController *activityVC =

        [[UIActivityViewController alloc] initWithActivityItems:activityItems

                                          applicationActivities:nil];

        

        activityVC.excludedActivityTypes = @[UIActivityTypePrint,

                                             UIActivityTypeAssignToContact,

                                             UIActivityTypeSaveToCameraRoll,

                                             UIActivityTypeAddToReadingList,

                                             UIActivityTypePostToFlickr,

                                             UIActivityTypePostToVimeo];

        

        [self presentViewController:activityVC animated:TRUE completion:nil];

    }

}

@end

/////////////////////////////////////////////////////////////////////////

- (IBAction)onShareButtonPressed:(id)sender {

    YDSDKArticleModelEx* aModel = [self article];

    [UIViewController showActivityWithURL:aModel.url.url completion:nil];

}