-(void)performCancel:(UIMenuController )sender { if (self.cell4Menu) { @try { if(![[WFCCIMService sharedWFCIMService] cancelSendingMessage:self.cell4Menu.model.message.messageId]) { [self.view makeToast:@"取消失败" duration:1 position:CSToastPositionCenter]; } } @catch (NSException exception) { [self.view makeToast:@"取消失败" duration:1 position:CSToastPositionCenter]; } } }