想要自定义个UIView
想要支持自动布局
－》所以就不打算初始化frame
－》但是导致init函数就没法写
－》最后就只好写成了：
class SearchPhoneView: UIView, UITextFieldDelegate { var searchImageView:UIImageView var searchTextField:UITextField init(){ self.searchImageView = UIImageView(image: UIImage(named: "search_phone")) self.searchTextField = UITextField() super.init(frame: CGRectZero) |
别处调用是：
var searchPhoneView:SearchPhoneView init(){ self.searchPhoneView = SearchPhoneView() super.init(nibName: nil, bundle: nil) } override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = ColorAppBackground self.view.addSubview(self.searchPhoneView) |
－》导致后续UI不显示。。。
搜：
swift uiview custom autolayout
ios – How to set constraints for a reusable UIView in Swift with auto layout? – Stack Overflow
Writing a Custom Control for iOS 8 using Swift and Auto Layout – Coursera Technology
Custom Live Views and Auto Layout — Swift + iOS 9 Development Training
改为了：
override init(frame: CGRect) { self.searchImageView = UIImageView(image: UIImage(named: "search_phone")) self.searchTextField = UITextField() // super.init(frame: CGRectZero) super.init(frame: frame) |
结果还是不显示。。。
swift custom UIView not show
ios – Custom UIView not showing up when added as subview – Stack Overflow
ios – Adding and changing a custom UIView programmatically (Swift) – Stack Overflow
后来看了下面的内容：
searchPhoneView.searchTextField=<UITextField: 0x7b6aa370; frame = (0 0; 0 0); text = ‘18168978839’; clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x7b6aa530>> searchPhoneView.searchTextField.placeholder=Optional("搜索手机号") searchPhoneView.searchImageView=<UIImageView: 0x7b6aa260; frame = (0 0; 20 20); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7b6aa340>> – (null) |
基本明白了：
主要是由于，没有设置frame的大小，导致内部的各种子view，没法显示。。。
结果是猜错了：
self.view.addSubview(self.searchPhoneView) searchPhoneView.frame = CGRectMake(0, 0, self.view.frame.width – 20, 68) // constrain(searchPhoneView) { searchPhoneView in // searchPhoneView.top == searchPhoneView.superview!.top + 10 // searchPhoneView.width == searchPhoneView.superview!.width – 20 // searchPhoneView.height == 48 // searchPhoneView.centerX == searchPhoneView.superview!.centerX // } |
还是不显示。
抽空再继续去弄吧。。。
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