隐藏和显示范围栏时的 uisearchbar 问题答案

【问题标题】：uisearchbar issue when scopebar is hide and show隐藏和显示范围栏时的 uisearchbar 问题
【发布时间】：2017-07-07 20:57:51
【问题描述】：

在展示搜索控制器时，我将 showScopeBar 属性设置为隐藏或显示范围栏

- (void)willPresentSearchController:(UISearchController *)searchController {
    // do something before the search controller is presented
    NSMutableArray *scopeArray = @[@"All"].mutableCopy;
    UISearchBar *searchBar =_searchController.searchBar;
    if (![labelDepartmentSelection.text isEqualToString:@"Department"]) {
        [scopeArray addObject:@"Department"];
    }
    if (![labelJobSelection.text isEqualToString:@"Job"]) {
        [scopeArray addObject:@"Job"];
    }
    searchBar.scopeButtonTitles = scopeArray;

    searchBar.showsScopeBar = scopeArray.count>1;
    [searchBar layoutIfNeeded];
    NSArray *subviews = searchBar.subviews;
    if([[UIDevice currentDevice].systemVersion floatValue]>=7.0) {
        //Get search bar with scope bar to reappear after search keyboard is dismissed
        UIView *scopeBar = [subviews.firstObject subviews].firstObject;
        [scopeBar setHidden:NO];
        CGRect frame = scopeBar.frame;
        frame.origin.y = frame.origin.y = 64.0;
        scopeBar.frame = frame;
    }
    [searchBar layoutSubviews];

    [searchBar sizeToFit];
    [serviceOptionTableView setContentInset:UIEdgeInsetsMake(scopeArray.count>1?44:0, 0, 0, 0)];

    serviceOptionTableView.tableHeaderView = searchController.searchBar;
}

当我只是根据范围标题隐藏和显示范围栏时，我希望它扭曲这是这种情况

- (void)willPresentSearchController:(UISearchController *)searchController {
    // do something before the search controller is presented
    NSMutableArray *scopeArray = @\[@"All"\].mutableCopy;
    UISearchBar *searchBar =_searchController.searchBar;
    if (!\[labelDepartmentSelection.text isEqualToString:@"Department"\]) {
        \[scopeArray addObject:@"Department"\];
    }
    if (!\[labelJobSelection.text isEqualToString:@"Job"\]) {
        \[scopeArray addObject:@"Job"\];
    }
    searchBar.scopeButtonTitles = scopeArray;

    searchBar.showsScopeBar = scopeArray.count>1;

    \[serviceOptionTableView setContentInset:UIEdgeInsetsMake(scopeArray.count>1?44:0, 0, 0, 0)\];

}

这是案例2的图片

【问题讨论】：

你能解决这个问题吗？
实际上我发现在运行时更新 uisearch bar 的范围会造成这个问题..

标签： objective-c uitableview uisearchbar uisegmentedcontrol uisearchcontroller

【解决方案1】：

如果您删除该行，问题应该会自行解决：

searchBar.showsScopeBar = scopeArray.count>1;

由于某种原因，设置 showScopeBar 属性会产生奇怪的效果。删除它允许默认动画行为没有任何问题。

【讨论】：