我正在构建一个简单的应用程序，我正在创建代码中的所有UI。该项目工作正常，直到我添加了一些标签的约束并添加一些东西到故事板（我发现故事板对线框图很有用）。
现在，当我尝试构建时，构建会在编译Swift文件期间冻结（Xcode仍会响应输入）。
之前（当项目建成时），我的班级看起来像这样：
class CurrentWeatherView: UIView {
weak var tempLowLabel: UILabel! = UILabel()
weak var tempLowIcon: UILabel! = UILabel()
weak var tempHighLabel: UILabel! = UILabel()
weak var tempHighIcon: UILabel! = UILabel()
weak var precipChanceLabel: UILabel! = UILabel()
weak var precipIconLabel: UILabel! = UILabel()
weak var humidity: UILabel! = UILabel()
weak var humidityIconLabel: UILabel! = UILabel()
weak var icon: UILabel! = UILabel()
weak var tempLabel: UILabel! = UILabel()
weak var summaryLabel: UILabel! = UILabel()
weak var summaryScroll: UIScrollView! = UIScrollView()
}
现在（当它不会构建时），它看起来像这样：
class CurrentWeatherView: UIView {
weak var tempLowLabel: UILabel! = UILabel()
weak var tempLowIcon: UILabel! = UILabel()
weak var tempHighLabel: UILabel! = UILabel()
weak var tempHighIcon: UILabel! = UILabel()
weak var precipChanceLabel: UILabel! = UILabel()
weak var precipIconLabel: UILabel! = UILabel()
weak var humidityLabel: UILabel! = UILabel()
weak var humidityIconLabel: UILabel! = UILabel()
weak var icon: UILabel! = UILabel()
weak var iconSummaryLabel: UILabel! = UILabel()
weak var tempLabel: UILabel! = UILabel()
weak var summaryLabel: UILabel! = UILabel()
weak var summaryScroll: UIScrollView! = UIScrollView()
func setUpLayout() {
self.addSubview(tempLowLabel)
self.addSubview(tempLowIcon)
self.addSubview(tempHighLabel)
self.addSubview(tempHighIcon)
self.addSubview(precipChanceLabel)
self.addSubview(precipIconLabel)
self.addSubview(humidityLabel)
self.addSubview(humidityIconLabel)
self.addSubview(icon)
self.addSubview(iconSummaryLabel)
self.addSubview(tempLabel)
self.addSubview(summaryLabel)
self.addSubview(summaryScroll)
tempLowLabel.translatesAutoResizingMaskToConstraints = false
tempLowIcon.translatesAutoResizingMaskToConstraints = false
tempHighLabel.translatesAutoResizingMaskToConstraints = false
tempHighIcon.translatesAutoResizingMaskToConstraints = false
precipChanceLabel.translatesAutoResizingMaskToConstraints = false
precipIconLabel.translatesAutoResizingMaskToConstraints = false
humidityLabel.translatesAutoResizingMaskToConstraints = false
humidityIconLabel.translatesAutoResizingMaskToConstraints = false
icon.translatesAutoResizingMaskToConstraints = false
iconSummaryLabel.translatesAutoResizingMaskToConstraints = false
tempLabel.translatesAutoResizingMaskToConstraints = false
summaryLabel.translatesAutoResizingMaskToConstraints = false
summaryScroll.translatesAutoResizingMaskToConstraints = false
NSLayoutConstraint.activate([
NSLayoutConstraint(item: tempHighIcon, attribute: .left, relatedBy: .equal, toItem: self, attribute: .left, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: tempHighIcon, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1.0, constant: 22),
tempHighIcon.heightAnchor.constraint(equalToConstant: 22),
tempHighIcon.widthAnchor.constraint(equalToConstant: 16),
NSLayoutConstraint(item: tempLowIcon, attribute: .left, relatedBy: .equal, toItem: self, attribute: .left, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: tempLowIcon, attribute: .top, relatedBy: .equal, toItem: tempHighIcon, attribute: .bottom, multiplier: 1.0, constant: 5),
tempLowIcon.heightAnchor.constraint(equalToConstant: 22),
tempLowIcon.widthAnchor.constraint(equalToConstant: 16),
NSLayoutConstraint(item: tempHighLabel, attribute: .left, relatedBy: .equal, toItem: tempHighIcon, attribute: .right, multiplier: 1.0, constant: 8),
NSLayoutConstraint(item: tempHighLabel, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1.0, constant: 22),
tempHighIcon.heightAnchor.constraint(equalToConstant: 22),
tempHighIcon.widthAnchor.constraint(equalToConstant: 42),
NSLayoutConstraint(item: tempLowLabel, attribute: .left, relatedBy: .equal, toItem: tempLowIcon, attribute: .right, multiplier: 1.0, constant: 8),
NSLayoutConstraint(item: tempLowLabel, attribute: .top, relatedBy: .equal, toItem: tempHighLabel, attribute: .bottom, multiplier: 1.0, constant: 5),
tempHighIcon.heightAnchor.constraint(equalToConstant: 22),
tempHighIcon.widthAnchor.constraint(equalToConstant: 42),
NSLayoutConstraint(item: icon, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1.0, constant: 22),
icon.centerXAnchor.constraint(equalTo: self.centerXAnchor),
icon.widthAnchor.constraint(equalToConstant: 85),
icon.heightAnchor.constraint(equalToConstant: 85),
iconSummaryLabel.centerXAnchor.constraint(equalTo: icon.centerXAnchor),
iconSummaryLabel.centerYAnchor.constraint(equalTo: icon.centerYAnchor),
iconSummaryLabel.heightAnchor.constraint(equalToConstant: 75),
iconSummaryLabel.widthAnchor.constraint(equalToConstant: 75),
NSLayoutConstraint(item: tempLabel, attribute: .top, relatedBy: .equal, toItem: icon, attribute: .bottom, multiplier: 1.0, constant: 8),
tempLabel.centerXAnchor.constraint(equalTo: self.centerXAnchor),
tempLabel.widthAnchor.constraint(equalToConstant: 85),
tempLabel.heightAnchor.constraint(equalToConstant: 25),
NSLayoutConstraint(item: summaryScroll, attribute: .left, relatedBy: .equal, toItem: self, attribute: .left, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: summaryScroll, attribute: .right, relatedBy: .equal, toItem: self, attribute: .right, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: summaryScroll, attribute: .bottom, relatedBy: .equal, toItem: self, attribute: .bottom, multiplier: 1.0, constant: 8),
summaryScroll.heightAnchor.constraint(equalToConstant: 21),
summaryScroll.centerXAnchor.constraint(equalTo: self.centerXAnchor),
NSLayoutConstraint(item: precipChanceLabel, attribute: .right, relatedBy: .equal, toItem: self, attribute: .right, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: precipChanceLabel, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1.0, constant: 22),
precipChanceLabel.heightAnchor.constraint(equalToConstant: 22),
precipChanceLabel.widthAnchor.constraint(equalToConstant: 42),
NSLayoutConstraint(item: humidityLabel, attribute: .right, relatedBy: .equal, toItem: self, attribute: .right, multiplier: 1.0, constant: 12),
NSLayoutConstraint(item: humidityLabel, attribute: .top, relatedBy: .equal, toItem: precipChanceLabel, attribute: .bottom, multiplier: 1.0, constant: 5),
humidityLabel.heightAnchor.constraint(equalToConstant: 22),
humidityLabel.widthAnchor.constraint(equalToConstant: 42),
NSLayoutConstraint(item: precipIconLabel, attribute: .right, relatedBy: .equal, toItem: precipChanceLabel, attribute: .left, multiplier: 1.0, constant: 8),
NSLayoutConstraint(item: precipIconLabel, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1.0, constant: 22),
precipIconLabel.heightAnchor.constraint(equalToConstant: 22),
precipIconLabel.widthAnchor.constraint(equalToConstant: 16),
NSLayoutConstraint(item: humidityIconLabel, attribute: .right, relatedBy: .equal, toItem: humidityLabel, attribute: .left, multiplier: 1.0, constant: 8),
NSLayoutConstraint(item: humidityIconLabel, attribute: .top, relatedBy: .equal, toItem: precipIconLabel, attribute: .bottom, multiplier: 1.0, constant: 5),
humidityIconLabel.heightAnchor.constraint(equalToConstant: 22),
humidityIconLabel.widthAnchor.constraint(equalToConstant: 16),
])
}
}
对于Xcode来说，所有这些限制是否都有很多？
此外，索引编制还没有完成。
我试过清理项目，清理构建文件夹，删除派生数据，重新启动我的机器，重新启动Xcode，更新Xcode和检查代码优化级别，但没有一个帮助。
答案 0 :(得分：0)
我能够通过更新到Xcode版本8.3 beta来解决这个问题。 Xcode 8.3刚刚发布，所以也可以使用。