将故事板控制器复制并粘贴到xib文件中。(Copy and paste storyboard controller into xib file. Supported or not?)
我想将故事板控制器重构为单独的xib,以获得更好的可重用性。 控制器扩展了UITableViewController。
我可以在故事板中选择控制器,点击Cmd-C,使用New File向导创建一个空的xib文件,最后将控制器粘贴到xib中。
它似乎工作正常。 UI元素在那里,插座就在那里等。它忘记了方向和大小(肖像,Retina 4英寸),但我可以在xcode中右侧的属性窗格中轻松设置它。
但是,当尝试使用此xib时,我收到错误消息:
加载“MyController”笔尖但未设置视图插座。
当我尝试将文件所有者连接到表视图(这是从UITableViewController扩展的控制器中的顶视图)时,xcode将不允许我连接它们。
我的问题: 是否不支持将控制器从故事板复制粘贴到xib?
I want to refactor out a storyboard controller to a separate xib, for better reusablity. The controller extends UITableViewController.
I can select the controller in the storyboard, hit Cmd-C, create an empty xib file using the New File wizard, and finally paste the controller into the xib.
It seems to work ok. The UI elements are there, the outlets are there, etc. It forgets the orientation and the size (portrait, Retina 4-inch), but I can easily set that in the properties pane to the right in xcode.
However when trying to use this xib I get a crash with error message:
loaded the "MyController" nib but the view outlet was not set.
When I try to connect Files Owner to the table view (which is the top view in a controller extended from UITableViewController), xcode won't let me connect them.
My question: Is it unsupported to copy-paste a controller from a storyboard to a xib?
原文:https://stackoverflow.com/questions/22305536
最满意答案
在Python 2.7.x中,时间增量有一个方法total_seconds来实现这个目的:
import datetime startTime = datetime.datetime.now() - datetime.timedelta(hours=2) endTime = datetime.datetime.now() + datetime.timedelta(hours=4) rest = endTime - datetime.datetime.now() total = endTime - startTime print "left: {:.2%}".format(rest.total_seconds()/total.total_seconds())
在Python 3.2中,您可以直接划分时间增量(不经过total_seconds)。
( Python 2.6.5中也注意到了这一点:将timedelta与timedelta分开 。)
In Python 2.7.x, time delta has a method total_seconds to achieve this:
import datetime startTime = datetime.datetime.now() - datetime.timedelta(hours=2) endTime = datetime.datetime.now() + datetime.timedelta(hours=4) rest = endTime - datetime.datetime.now() total = endTime - startTime print "left: {:.2%}".format(rest.total_seconds()/total.total_seconds())
In Python 3.2, you can apparently divide the time deltas directly (without going through total_seconds).
(This has also been noted in Python 2.6.5: Divide timedelta with timedelta.)
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