我有以下代码:
// ViewController.swift
// Copypasta Keyboard
//
// Created by vroy on 5/30/16.
// Copyright © 2016 vroy. All rights reserved.
//
import UIKit
import SnapKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let thankYouMessage = UILabel()
thankYouMessage.text = "Thank You for Installing the Keyboard."
thankYouMessage.textAlignment = .Center
thankYouMessage.numberOfLines = 1
thankYouMessage.snp_makeConstraints { (make) -> Void in
//The program crashes if either of the following two lines are uncommented.
make.top.left.right.equalTo(0)
make.height.equalTo(self.view.snp_height).multipliedBy(0.2)
}
self.view.addSubview(thankYouMessage)
}
}
如果两行中的任何一行:
make.top.left.right.equalTo(0)
make.height.equalTo(self.view.snp_height).multipliedBy(0.2)
执行我收到SIGABRT错误:
我使用的是SnapKit库版本0.19.0
我该怎么办?
答案 0 :(得分:0)
您需要在制定约束之前添加子视图。所以把代码转换成这个:
let thankYouMessage = UILabel()
thankYouMessage.text = "Thank You for Installing the Keyboard."
thankYouMessage.textAlignment = .Center
thankYouMessage.numberOfLines = 1
self.view.addSubview(thankYouMessage)
thankYouMessage.snp_makeConstraints { (make) -> Void in
//The program crashes if either of the following two lines are uncommented.
make.top.left.right.equalTo(0)
make.height.equalTo(self.view.snp_height).multipliedBy(0.2)
}