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我有我的自定義拉刷新以下代碼。UITableView自定義拉刷新視圖不顯示
CGFloat customRefreshControlHeight = 50.0f;
CGFloat customRefreshControlWidth = 320.0f;
CGRect customRefreshControlFrame = CGRectMake(0.0f,
-customRefreshControlHeight,
customRefreshControlWidth,
customRefreshControlHeight);
TestRefreshView *refreshView = [[TestRefreshView alloc] init];
refreshView.frame = customRefreshControlFrame;
self.testRefreshView = refreshView;
[self.tableView addSubview: self.testRefreshView];
但是,當我拉下桌子時,這個視圖不顯示。還有什麼我需要建立,我失蹤了?