奥特莱斯出现零
[英]Outlets are showing nil
问题描述
I outleted some views and buttons. 
我发布了一些视图和按钮。 and make synthesised to it on .m file. 并在.m文件中合成它。 outlet properties are (strong,nonatomic) though when I try to access it on viewwillappear it is showing (nil) . 出口属性是(strong,nonatomic)但是当我尝试在viewwillappear上访问它时它显示(nil) 。 Can anyone help me that how could I access it? 任何人都可以帮助我，我怎么能访问它？ thanks in advance. 提前致谢。
1 个解决方案
解决方案1
3 已采纳 2015-06-19 11:04:25
Go into your Storyboard file, right-click on the offending control, and make sure that you have a variable name shown under "Referencing Outlets". 进入Storyboard文件，右键单击有问题的控件，并确保在“Referencing Outlets”下显示变量名称。
If it's not... the control isn't bound to a variable, and that'd explain your nil. 如果它不是......控件没有绑定到变量，那就解释你的零。
You can also go into your .h file, and check that your IBOutlet s all have filled in circles to the left of them. 您也可以进入.h文件，并检查您的IBOutlet是否已填入左侧的圆圈。 This also tells you that they are bound to a control. 这也告诉你它们被绑定到一个控件。
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