我一直在尝试使用新的UIActivityViewController替换所有的UIActionSheets进行共享,但是我遇到了一个问题.
我有5个活动,Message,Email,Copy,Twitter和Facebook.我已经弄清楚如何让他们显示不同的文字,通过这个定制的UIActivityProvider子类：
- (id) activityViewController:(UIActivityViewController *)activityViewController
itemForActivityType:(NSString *)activityType
{
if ( [activityType isEqualToString:UIActivityTypePostToTwitter] )
return twitter;
if ( [activityType isEqualToString:UIActivityTypePostToFacebook] )
return facebook;
if ( [activityType isEqualToString:UIActivityTypeMessage] )
return urlScheme;
if ( [activityType isEqualToString:UIActivityTypeMail] )
return urlScheme;
if ( [activityType isEqualToString:UIActivityTypeCopyToPasteboard])
return urlScheme;
return nil;
}
这在我看来控制器：
ActivityProvider *aProvider = [[ActivityProvider alloc] init];
aProvider.facebook = facebook;
aProvider.twitter = twitter;
aProvider.urlScheme = URL;
NSArray *Items = @[aProvider,sharedURL];
UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:Items applicationActivities:Nil];
activityVC.excludedActivityTypes = @[UIActivityTypePrint,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll,UIActivityTypePostToWeibo];
[self presentViewController:activityVC animated:TRUE completion:nil];
但是,我只想在Facebook和Twitter分享表中显示URL(sharedURL),而不是邮件,电子邮件或副本.任何方式来完成这个？
解决方法
您可以选择要发送给每种类型的活动.我创建了一个自定义活动提供者,并将其称为：
NSMutableArray *activityItems = [NSMutableArray array];
CustomActivityItemProvider *activityItemProvider =
[[CustomActivityItemProvider alloc] initWithText:text
urlText:urlString];
[activityItems addObject:activityItemProvider];
//you can have your own custom activities too:
NSArray *applicationActivities = @[[CustomActivity new],[OtherCustomActivity new]];
UIActivityViewController *vc = [[UIActivityViewController alloc]initWithActivityItems:activityItems
applicationActivities:applicationActivities];
自定义提供程序是UIActivityItemProvider的子类
@interface CustomActivityItemProvider : UIActivityItemProvider - (id)initWithText:(NSString *)text urlText:(NSString *)url; @end
- (id)initWithText:(NSString *)text urlText:(NSString *)url{
if ((self = [super initWithPlaceholderItem:text])) {
self.text = text ?: @"";
self.url = url ?: @"";
}
return self;
}
- (id)item {
NSString *activityType = self.activityType;
if ([self.placeholderItem isKindOfClass:[NSString class]]) {
if ([self.activityType isEqualToString:UIActivityTypePostToFacebook] ||
[self.activityType isEqualToString:UIActivityTypeMail]) {
return [NSString stringWithFormat:@"%@\n%@",self.text,self.url];
} else if ([activityType isEqualToString:UIActivityTypePostToTwitter]) {
return [self findBestStringOfLength:kTwitterMessageLength hashTags:YES];
} else if ([activityType isEqualToString:UIActivityTypeMessage]) {
return [self findBestStringOfLength:kSMSMessageLength hashTags:YES];
} else {
return self.text;
}
}
return self.placeholderItem;
}
