Question

您好我正在开发我正在使用动作表的小型IOS应用程序。所以我的问题是这样的，当我在动作表外部点击它关闭我的动作表它正在调用- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex方法，即使我没有点击动作表的任何按钮。它返回lastindexof操作表按钮。那么如何避免这种情况。有解决方案吗我试过-(void)actionSheet:(UIActionSheet *)action didDismissWithButtonIndex:(NSInteger)buttonIndex但结果仍然相同。

Answer 1

我自己编写时间选择器而不是iOS8中的UIActionSheet：

date = [NSDate date];

timePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 44, 0, 0)];
timePicker.datePickerMode = UIDatePickerModeDateAndTime;
timePicker.hidden = NO;
timePicker.date = date;

displayFormatter = [[NSDateFormatter alloc] init];
[displayFormatter setTimeZone:[NSTimeZone localTimeZone]];
[displayFormatter setDateFormat:@"MM月dd日 EEE HH:mm"];

formatter = [[NSDateFormatter alloc] init];
[formatter setTimeZone:[NSTimeZone localTimeZone]];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

startDisplayTimeString = [displayFormatter stringFromDate:timePicker.date];
startTimeString = [formatter stringFromDate:timePicker.date];

NSTimeInterval interval = 24*60*60*1;
NSDate *endDate = [[NSDate alloc] initWithTimeIntervalSinceNow:interval];
endDisplayTimeString = [displayFormatter stringFromDate:endDate];
endTimeString = [formatter stringFromDate:endDate];

[_startTimeLabel setText:startDisplayTimeString];
[_endTimeLabel setText:endDisplayTimeString];

[pickerViewPopup dismissWithClickedButtonIndex:1 animated:YES];

NSDateFormatter *dateFormatter =[[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 64)];
pickerToolbar.tintColor = [UIColor whiteColor];
[pickerToolbar sizeToFit];

UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelBtnPressed:)];

[cancelBtn setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                   [UIColor colorWithRed:253.0/255.0 green:68.0/255.0 blue:142.0/255.0 alpha:1.0],
                                   NSForegroundColorAttributeName,
                                   nil] forState:UIControlStateNormal];

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];

UIBarButtonItem *titleButton;

float pickerMarginHeight = 168;


titleButton = [[UIBarButtonItem alloc] initWithTitle:@"title" style:UIBarButtonItemStylePlain target: nil action: nil];

[titleButton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                     [UIColor colorWithRed:253.0/255.0 green:68.0/255.0 blue:142.0/255.0 alpha:1.0],
                                     NSForegroundColorAttributeName,
                                     nil] forState:UIControlStateNormal];

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"OK" style:UIBarButtonItemStyleDone target:self action:@selector(setTimePicker)];

[doneBtn setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                 [UIColor colorWithRed:253.0/255.0 green:68.0/255.0 blue:142.0/255.0 alpha:1.0],
                                 NSForegroundColorAttributeName,
                                 nil] forState:UIControlStateNormal];

NSArray *itemArray = [[NSArray alloc] initWithObjects:cancelBtn, flexSpace, titleButton, flexSpace, doneBtn, nil];

[pickerToolbar setItems:itemArray animated:YES];

if(iPad){

    [pickerToolbar setFrame:CGRectMake(0, 0, 320, 44)];

    UIViewController* popoverContent = [[UIViewController alloc] init];
    popoverContent.preferredContentSize = CGSizeMake(320, 216);
    UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 216)];
    popoverView.backgroundColor = [UIColor whiteColor];
    [popoverView addSubview:timePicker];
    [popoverView addSubview:pickerToolbar];
    popoverContent.view = popoverView;
    popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
    [popoverController presentPopoverFromRect:CGRectMake(0, pickerMarginHeight, 320, 216) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

}else{

    timeBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, SCREEN_HEIGHT-300, 320, 246)];
    [timeBackgroundView setBackgroundColor:[UIColor colorWithRed:240/255.0 green:240/255.0 blue:240/255.0 alpha:1.0]];

    [timeBackgroundView addSubview:pickerToolbar];
    [timeBackgroundView addSubview:timePicker];

    [self.view addSubview:timeBackgroundView];}

Answer 2

当您点击UIActionSheet之外时，UIKit会执行与点击取消按钮相同的操作。 buttonIndex中发送的- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex是取消按钮索引。默认情况下，无法知道用户是否在UIActionSheet外部进行了点击。如果您需要此功能，则必须编写自己的自定义操作表，或将外部点击作为取消点击。

IOS操作表按钮选择无法正常工作

2 个答案: