Question

我正在使用splitViewController在我的应用中启用滑出菜单，在iOS 9上使用Swift。

除了我无法为我的“菜单”按钮（这是splitViewController的displayModeButtonItem）获取自定义图像外，所有工作都按预期工作。

这是我尝试过的。

#!/usr/bin/perl
use Test::More;
use Test::MockObject;
use Date::Calc;

# scope of mocked Date::Calc
{
    my $import;
    my $mock = Test::MockObject->new();
    $mock->fake_module('Date::Calc', import => sub { $import = caller} );
    $mock->fake_new('Date::Calc');
    $mock->mock('Days_in_Year', sub {print "how to mock parameter - month to be 2\n"});
    # is it possible to mock a parameter? how if possible?
    my $days_mock = $mock->Days_in_Year(2015,6);
    ok($days_mock == 59, "expect: 59, got: $days_mock\n");
}

# unmocked module and methods
my $days_in_year = Date::Calc::Days_in_Year(2015,6);
ok($days_in_year == 181, "expect: 181, got: $days_in_year\n");
done_testing(2);

这个版本是我尝试使用自定义图像而不是文本标题，但我只是得到一个灰色框，图像应该是。

override func viewDidLayoutSubviews() {

  // This will create a properly-working menu barbuttonitem, but is of course
  // a text based title.

  navigationItem.leftBarButtonItem = UIBarButtonItem(title: "≡", 
    style: UIBarButtonItemStyle.Plain,
    target: splitViewController!.displayModeButtonItem().target,
    action: splitViewController!.displayModeButtonItem().action)

有什么建议吗？感谢

Answer 1

您需要制作UIButton并在其中设置图片，并将其设置为-viewDidLoad中的leftBarButtonItem：

let menuButton = UIButton(type: .Custom)
menuButton.frame = CGRectMake(0, 0, 29, 29)
menuButton.setImage(UIImage(named:"29x29"), forState: .Normal)
menuButton.addTarget(self, action: "menuPressed:", forControlEvents: .TouchUpInside)
let barButton = UIBarButtonItem(customView: menuButton)
navigationItem.leftBarButtonItem = barButton

并以单独的方法执行您的操作：

func menuPressed(sender: AnyObject) {
    //show menu
}

使用splitViewController的自定义图像时出现问题displayModeButtonItem（UIBarButtonItem）Swift IOS 9

1 个答案: