在Interface Builder中,我使用水平UIStackView并希望将项目放置为:
xx xx xx
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每个x代表一个项目.Item1和item2应该相互粘贴,但item2和item3应该是间隔的,依此类推.这意味着我不希望所有项目之间保持恒定的间距.
我怎么能这样做?
(可能相当于工具栏的灵活空间)
谢谢 !
在Xcode 7.2上,如何禁用这些调试/应用程序测量intempestive显示:
2016-01-07 11:52:53.085 MyApp[1457:] <GMR/INFO> App measurement v.1302000 started
2016-01-07 11:52:53.091 MyApp[1457:] <GMR/INFO> To enable debug logging set the following application argument: -GMRDebugEnabled (see http://goo.gl/Y0Yjwu)
2016-01-07 11:52:53.091 MyApp[1457:] <GMR/DEBUG> Debug logging enabled
2016-01-07 11:52:53.092 MyApp[1457:] <GMR/DEBUG> App measurement is monitoring the network status
2016-01-07 11:52:53.188 MyApp[1457:] <GMR/DEBUG> App measurement is ready to receive events
2016-01-07 11:52:53.201 MyApp[1457:] <GMR/DEBUG> No network. Upload task will not be scheduled
2016-01-07 11:52:53.202 MyApp[1457:] <GMR/DEBUG> Scheduling user engagement timer
2016-01-07 11:52:53.202 MyApp[1457:] <GMR/DEBUG> Timer …Run Code Online (Sandbox Code Playgroud) 我有这样的故事板
- > NavigationController - > LoginView - > TabBarController - > VC1 - > VC2
我没有设法从VC1"移动"到VC2保持标签栏.
我尝试了以下几点:
Segue(显示类型)
self.performSegueWithIdentifier("toVC2segue", sender: self)
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// prepare for future display
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let navigationVC = UIApplication.sharedApplication().keyWindow?.rootViewController as! UINavigationController
// prepare next view
let vc = storyboard.instantiateViewControllerWithIdentifier("VC2id")
self.tabBarController?.navigationController?.pushViewController(vc, animated: true)
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我也试过了
self.hidesBottomBarWhenPushed = false
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但这并没有改变任何事情.
你有其他想法吗?
PS:我上面更新了我的计划......
编辑:阅读下面的答案后,我尝试添加另一个导航控制器:
- > NavigationController - > LoginView - > TabBarController - > NavigationController - > VC1 - > VC2
但我现在有2个导航条叠加在VC1和VC2中......
我想为多个值做一个切换案例,其中这些值来自字典的键.
myDict = ["dog": "waf", "cat": "meaow", "cow":"meuh"]
let animal = "cat"
switch animal {
case myDict.keys :
print(myDict[animal])
case "lion" :
print("too dangerous !")
}
default :
print("unknown animal")
}
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如何获取myDict键并将其转换为元组(或其他))?我试过Array(myDict.keys)但它失败了:
Expression pattern of type 'Array<String>' cannot match values of type
'String'
Run Code Online (Sandbox Code Playgroud) 我有两个表Cars2016和Cars2015,它们具有完全相同的列。
我想简单地连接这两个表来创建这种查询:
SELECT Mark, COUNT(Models) FROM (Cars2015 UNION Cars2016) GROUP BY Mark
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此查询旨在了解每个标记有多少模型,累计 2015 年和 2016 年。
我怎样才能有效地做到这一点?
谢谢 !