如何通过UIActivityViewController分享不同的URL？

Question

我正在尝试使用UIActivityViewController分享每个项目的不同URL。例如，对于Twitter：www.google.com；对于Facebook：www.bing.com。

我知道我可以为每个项目自定义文本，但似乎找不到为每个项目自定义URL的方法。

我已经尝试了子类化UIActivityItemProvider，但没有成功：

FILE .m

- (id)initWithText:(NSString *)text{

if ((self = [super initWithPlaceholderItem:text])) {
    self.text = text ?: @"";
    self.url = @"";
}
    return self;
}

- (id)item {
    NSString *activityType = self.activityType;

    if ([self.placeholderItem isKindOfClass:[NSString class]]) {

        if ([self.activityType isEqualToString:UIActivityTypePostToFacebook]) {

            self.url = kSHARELINK_FB;

        } else if ([activityType isEqualToString:UIActivityTypePostToTwitter]) {

            self.url = kSHARELINK_TWITTER;


        } else if ([activityType isEqualToString:UIActivityTypeMessage]) {

            self.url = kSHARELINK_SMS;


            } else if([activityType 

isEqualToString:UIActivityTypeMail]){
            self.url = kSHARELINK_EMAIL;


        }else if ([activityType 

isEqualToString:UIActivityTypePostToWeibo]){
            self.url = kSHARELINK_WEIBO;

        }else{

            self.url = kSHARELINK_OTHER;

        }
    }

    return self.placeholderItem;
}

文件 .h

 @interface LLCustomActivityItemProvider : UIActivityItemProvider

@property (copy, nonatomic) NSString *text;
@property (copy, nonatomic) NSString *url;

- (id)initWithText:(NSString *)text;

- jonypz

Answer 1

原来我漏掉了return self.url;的语句...

- (id)item {
    NSString *activityType = self.activityType;

    if ([self.placeholderItem isKindOfClass:[NSString class]]) {

        if ([self.activityType isEqualToString:UIActivityTypePostToFacebook]) {

            self.url = kSHARELINK_FB;

        } else if ([activityType isEqualToString:UIActivityTypePostToTwitter]) {

            self.url = kSHARELINK_TWITTER;


        } else if ([activityType isEqualToString:UIActivityTypeMessage]) {

            self.url = kSHARELINK_SMS;


            } else if([activityType isEqualToString:UIActivityTypeMail]){
            self.url = kSHARELINK_EMAIL;


        }else if ([activityType isEqualToString:UIActivityTypePostToWeibo]){
            self.url = kSHARELINK_WEIBO;

        }else{

            self.url = kSHARELINK_OTHER;

        }
      return self.url;
    }

    return self.placeholderItem;
}

- jonypz