iOS使用UIActivityViewController可以调起系统自带的分享功能，但是系统自带的微信分享不支持纯文字分享，可以用以下方式将微信分享屏蔽掉：
@interface UIActivityViewController (Private)
- (BOOL)_shouldExcludeActivityType:(UIActivity*)activity;
@end
@interface MyActivityViewController : UIActivityViewController
@end
@implementation MyActivityViewController
- (BOOL)_shouldExcludeActivityType:(UIActivity *)activity
{
if ([[activity activityType] isEqualToString:@"com.tencent.xin.sharetimeline"])
{
return YES;
}
return [super _shouldExcludeActivityType:activity];
}
@end
参考How to exclude Notes and Reminders apps from the UIActivityViewController?
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