我有一个自定义的UIView子类,通过Nib文件(UIImageView,UIView和UITextField)和IBOutlets集添加了三个子视图。但是当在子类中调用awakeFromNib
或initWithCoder
时,所有IBOutlet都是nil
,甚至子视图数组为空。
我正在使用Swift和XCode 6 beta 5,其中这个UIView 子类在框架中,我将UIView子类添加到项目中的Storyboard中,这样我就可以使用新的实时查看技术。但我无法在实时视图中看到添加的子视图,这非常令人难过。
我无法找到解决此问题的方法,这是我的UIView子类中的代码:
import UIKit
@IBDesignable public class BlurredSheetEntryView: UIView {
@IBOutlet var iconImageView: UIImageView?
@IBOutlet var separatorView: UIView?
@IBOutlet public var textField: UITextField?
override init(frame: CGRect) {
super.init(frame: frame)
}
required public init(coder aDecoder: NSCoder!) {
super.init(coder: aDecoder)
for subView in self.subviews {
println("subView: \(subView)")
}
println("self.textField: \(self.textField)")
println("self.iconImageView: \(self.iconImageView)")
println("self.separatorView: \(self.separatorView)")
}
override public func awakeFromNib() {
for subView in self.subviews {
println("subView: \(subView)")
}
println("self.textField: \(self.textField)")
println("self.iconImageView: \(self.iconImageView)")
println("self.separatorView: \(self.separatorView)")
}
}
我的Nib文件看起来像这样:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6205" systemVersion="14A314h" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6198"/>
<capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
</dependencies>
<objects>
<placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
<placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
<view contentMode="scaleToFill" id="iN0-l3-epB" customClass="BlurredSheetEntryView" customModule="BlurredSheetEntry" customModuleProvider="target">
<rect key="frame" x="0.0" y="0.0" width="300" height="50"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="ZnN-gy-Mc6">
<rect key="frame" x="8" y="5" width="40" height="40"/>
<constraints>
<constraint firstAttribute="width" secondItem="ZnN-gy-Mc6" secondAttribute="height" multiplier="1:1" id="C4N-zC-woh"/>
</constraints>
</imageView>
<textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" placeholder="Placeholder" minimumFontSize="17" clearButtonMode="whileEditing" translatesAutoresizingMaskIntoConstraints="NO" id="npg-xI-NSo">
<rect key="frame" x="66" y="8" width="226" height="34"/>
<fontDescription key="fontDescription" type="system" pointSize="15"/>
<textInputTraits key="textInputTraits"/>
</textField>
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="8lA-9y-yoA">
<rect key="frame" x="56" y="5" width="2" height="40"/>
<color key="backgroundColor" white="0.66666666666666663" alpha="1" colorSpace="calibratedWhite"/>
<constraints>
<constraint firstAttribute="width" constant="2" id="QgG-pW-8q0"/>
</constraints>
</view>
</subviews>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
<constraints>
<constraint firstAttribute="bottom" secondItem="8lA-9y-yoA" secondAttribute="bottom" constant="5" id="51o-Il-vGA"/>
<constraint firstItem="8lA-9y-yoA" firstAttribute="leading" secondItem="ZnN-gy-Mc6" secondAttribute="trailing" constant="8" id="AEG-I2-vsT"/>
<constraint firstAttribute="bottom" secondItem="npg-xI-NSo" secondAttribute="bottom" constant="8" id="E0H-fN-lg4"/>
<constraint firstItem="8lA-9y-yoA" firstAttribute="top" secondItem="iN0-l3-epB" secondAttribute="top" constant="5" id="EYR-L8-96J"/>
<constraint firstAttribute="bottom" secondItem="ZnN-gy-Mc6" secondAttribute="bottom" constant="5" id="GFW-R2-jGI"/>
<constraint firstAttribute="trailing" secondItem="npg-xI-NSo" secondAttribute="trailing" constant="8" id="Lws-lv-n37"/>
<constraint firstItem="ZnN-gy-Mc6" firstAttribute="top" secondItem="iN0-l3-epB" secondAttribute="top" constant="5" id="Pv0-ZV-aT4"/>
<constraint firstItem="ZnN-gy-Mc6" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="8" id="XOI-jO-Sv7"/>
<constraint firstItem="npg-xI-NSo" firstAttribute="top" secondItem="iN0-l3-epB" secondAttribute="top" constant="8" id="dA3-Wg-XfN"/>
<constraint firstItem="npg-xI-NSo" firstAttribute="leading" secondItem="8lA-9y-yoA" secondAttribute="trailing" constant="8" id="mq6-6r-Z2b"/>
</constraints>
<nil key="simulatedStatusBarMetrics"/>
<freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
<connections>
<outlet property="iconImageView" destination="ZnN-gy-Mc6" id="0Hp-sr-mqx"/>
<outlet property="separatorView" destination="8lA-9y-yoA" id="VFx-En-K3c"/>
<outlet property="textField" destination="npg-xI-NSo" id="tIy-N2-g2j"/>
</connections>
<point key="canvasLocation" x="371" y="327"/>
</view>
</objects>
</document>
更新 我创建了一个绝对简单的示例项目,我只做了以下内容:
当我建立&amp;运行并单击&#34; +&#34; - 在右上角签名,我得到&#34; nil&#34;由于@IBOutlet而在控制台上打印出来。 这是我的问题,让我烦恼的是什么。但也许我在这里做错了......
我上传了示例项目,这里是下载网址: https://www.dropbox.com/s/vcb0sa98tw6i1iv/NilObjectsFromXib.zip?dl=0
我正在使用框架,因为我必须在我的主故事板中将我的子类视为实时视图。
提前感谢您的帮助! :)
答案 0 :(得分:-1)
我查看了您的项目并:
您需要在项目设置中将XIB文件添加到Copy bundle resourses
您需要通过以下方式在表格视图中注册自定义单元格XIB:
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.registerNib(UINib(nibName:"MyCustomTableViewCell", bundle: nil), forCellReuseIdentifier: "CustomCell")
}
然后您可以在表格中使用自定义单元格:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CustomCell", forIndexPath: indexPath) as MyCustomTableViewCell
// Do something with your cell
return cell
}