UIActionSheet iOS 8 错误

Posted 2023-02-23

【中文标题】UIActionSheet iOS 8 错误

【英文标题】：UIActionSheet iOS 8 error

【发布时间】：2015-05-18 09:23:05

【问题描述】：

我正在尝试通过UITableViewCell 上的按钮在 iPad 上显示UIActionSheet。它在 ios 7 上运行良好，但在 iOS 8 上无法正常运行。UIActionSheet 包含一些视觉伪影，我在控制台中收到此警告：

    Unable to simultaneously satisfy constraints.
        Probably at least one of the constraints in the following list is one you don't want. 
Try this: 
(1) look at each constraint and try to figure out which you don't expect; 
(2) find the code that added the unwanted constraint or constraints and fix it. 
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
    (
        "<NSLayoutConstraint:0x79793de0 H:[UIView:0x797a7630(304)]>",
        "<NSLayoutConstraint:0x7a16ae00 UIView:0x7a16ab60.width == _UIAlertControllerView:0x797a9230.width>",
        "<NSAutoresizingMaskLayoutConstraint:0x7a66f2a0 h=--& v=--& H:[UIView:0x7a16ab60(298)]>",
        "<NSLayoutConstraint:0x797a49e0 _UIAlertControllerView:0x797a9230.width >= UIView:0x797a7630.width>"
    )

    Will attempt to recover by breaking constraint 
    <NSLayoutConstraint:0x79793de0 H:[UIView:0x797a7630(304)]>

    Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
    The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

我的代码：

- (void)onFavoriteBtn:(id)sender 
    CGPoint btnPosition = [sender convertPoint:CGPointZero toView:_tableView];
    NSIndexPath *indexPath = [_tableView indexPathForRowAtPoint:btnPosition];
    if (indexPath) 
        UIButton *favoriteBtn = (UIButton *)sender;
        CGRect favoriteBtnRect = favoriteBtn.frame;

        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Remove from Favorites" otherButtonTitles:nil];
        [sheet showFromRect:favoriteBtnRect inView:favoriteBtn.superview animated:true];
    

【参考方案1】：

UIActionSheet 已弃用，因此您可以使用 iOS 8.0 或更高版本中提供的UIAlertViewController。

- (IBAction)onFavoriteBtn:(id)sender 
    CGPoint btnPosition = [sender convertPoint:CGPointZero toView:self.tableView];
    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:btnPosition];
    if (indexPath) 

        [self showActionSheet:sender];
    


- (void)showActionSheet:(UIView *)sender

    NSString *alertTitle = NSLocalizedString(@"ActionTitle", @"Archive or Delete Data");
    NSString *alertMessage = NSLocalizedString(@"ActionMessage", @"Deleted data cannot be undone");

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:alertTitle
                                                                             message:alertMessage
                                                                      preferredStyle:UIAlertControllerStyleActionSheet];

    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel action")
                                                           style:UIAlertActionStyleCancel
                                                         handler:^(UIAlertAction *action)
                                   
                                       NSLog(@"Cancel action");
                                   ];

    UIAlertAction *deleteAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"Delete", @"Delete action")
                                                           style:UIAlertActionStyleDestructive
                                                         handler:^(UIAlertAction *action)
                                   
                                       NSLog(@"Delete action");
                                   ];

    UIAlertAction *archiveAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"Archive", @"Archive action")
                                                            style:UIAlertActionStyleDefault
                                                          handler:^(UIAlertAction *action)
                                    
                                        NSLog(@"Archive action");
                                    ];

    [alertController addAction:cancelAction];
    [alertController addAction:deleteAction];
    [alertController addAction:archiveAction];

    UIPopoverPresentationController *popover = alertController.popoverPresentationController;
    if (popover)
    
        popover.sourceView = sender;
        popover.sourceRect = sender.bounds;
        popover.permittedArrowDirections = UIPopoverArrowDirectionAny;
    

    [self presentViewController:alertController animated:YES completion:nil];

【讨论】：

您建议根据iOS版本决定运行时使用UIActionSheet还是UIAlertController？

@user1561346 没错。

UIAlertController 在控制台中具有相同的外观错误和相同的警告。没想到，真的。 :/ 当然我已经添加了alertController.popoverPresentationController.sourceRect 和alertController.popoverPresentationController.sourceView。

我已经尝试了相同的代码，一切都按预期工作。检查您的故事板可能存在一些限制问题。

【参考方案2】：

看起来您最喜欢的按钮超级视图太小而无法嵌入操作表。尝试使用窗口显示操作表，只是不要忘记转换收藏按钮的坐标：

- (void)onFavoriteBtn:(id)sender 
    CGPoint btnPosition = [sender convertPoint:CGPointZero toView:_tableView];
    NSIndexPath *indexPath = [_tableView indexPathForRowAtPoint:btnPosition];
    if (indexPath) 
        UIButton *favoriteBtn = (UIButton *)sender;
        CGRect frame = [self.window convertRect:favoriteBtn.bounds fromView:favoriteBtn];
        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Remove from Favorites" otherButtonTitles:nil];
        [sheet showFromRect:frame inView:self.window animated:true];
    

【讨论】：

我认为视图不必足够大以适应它。它只是用来找位置的。但我尝试将 frame 转换为 self.view 和 self.navigationController.view。