Question

我有一个带有UINavigationController的应用程序，其中包含一堆UITableViewControllers，我根据用户选择的内容将其换出。所有的UITableViewControllers都有一个按钮＆＃34; Add Event＆＃34;。在大约一半的表视图控制器上，该按钮根本不会触发。对于我的生活，我无法弄清楚原因。

这是一个无法工作的初始函数的示例。有问题的按钮是＆＃34; doneButton＆＃34;。单击时不会触发addEvent（）。

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle: UITableViewStyleGrouped];
    if (self) {
        // initialize toolbar
        toolbar = [[UIToolbar alloc] initWithFrame: CGRectMake( 0, 0, 768, 44 )];
        titleLabel = [[UILabel alloc] initWithFrame: CGRectMake( 284, 4, 200, 35 )];
        titleLabel.text = @"End Repeat";
        titleLabel.textAlignment = NSTextAlignmentCenter;
        titleLabel.font = [UIFont boldSystemFontOfSize: 20];
        titleLabel.textColor = [UIColor grayColor];
        titleLabel.backgroundColor = [UIColor clearColor];
        [toolbar addSubview: titleLabel];
        UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: nil action: nil];
        UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle: @"Add Event" style: UIBarButtonItemStyleDone target: self action: @selector(addEvent)];
        NSArray *buttonArray = [NSArray arrayWithObjects: flexibleSpace, doneButton, nil];
        [toolbar setItems: buttonArray];
        [self.view addSubview: toolbar];

        // initialize date picker
        datePicker = [[UIDatePicker alloc] initWithFrame: CGRectMake( 0.0, 0.0, 768.0, 216.0 )];
        datePicker.datePickerMode = UIDatePickerModeDate;
        [datePicker addTarget: self action: @selector(changeDate) forControlEvents: UIControlEventValueChanged];

        [self roundDatePicker];
        [self parseDone];
    }
    return self;
}

这是一个可以工作的初始函数的例子：

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle: UITableViewStyleGrouped];
    if (self) {
        // Custom initialization
        caController = [[CAViewController alloc] init];
        selectedRow = 0;

        self.title = @"Calendar";

        self.toolbar = [[UIToolbar alloc] initWithFrame: CGRectMake( 0, 0, 768, 44 )];
        titleLabel = [[UILabel alloc] initWithFrame: CGRectMake( 284, 4, 200, 35 )];
        titleLabel.text = @"Select Calendar";
        titleLabel.textAlignment = NSTextAlignmentCenter;
        titleLabel.font = [UIFont boldSystemFontOfSize: 20];
        titleLabel.textColor = [UIColor grayColor];
        titleLabel.backgroundColor = [UIColor clearColor];
        [toolbar addSubview: titleLabel];
        UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: nil action: nil];
        UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle: @"Add Event" style: UIBarButtonItemStyleDone target: self action: @selector(addEvent)];
        NSArray *buttonArray = [NSArray arrayWithObjects: flexibleSpace, doneButton, nil];
        [toolbar setItems: buttonArray];
        [self.view addSubview: toolbar];
    }
    return self;
}

Answer 1

逐步重建我的应用程序2个月，我终于找到了它！这阻止了我的按钮：

- (UIView*) tableView: (UITableView*) tableView viewForHeaderInSection: (NSInteger) section {
    return [[UIView alloc] initWithFrame:CGRectMake(0, 0, 0, 1)];
}

对于我的生活，我无法弄清楚这些代码的作用或者为什么我首先将它放在那里。我删除了它，现在一切似乎都正常。

UIBarButtonItem按钮未触发

1 个答案: