ViewController 生命周期
import UIKit
class ViewController: UIViewController{
var count = 0
// 第一次获取 view 属性时调用
override func loadView() {
super.loadView()
count+=1
print("\(count)loadView") // 1
}
override func viewDidLoad() {
super.viewDidLoad()
count+=1
print("\(count)viewDidLoad") // 2
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
count+=1
print("\(count)viewWillAppear") // 3
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
count+=1
print("\(count)viewWillLayoutSubviews") // 4
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
count+=1
print("\(count)viewDidLayoutSubviews") // 5
}
//这里才出现看到的东西
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
count+=1
print("\(count)viewDidAppear") // 6
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
count+=1
print("\(count)viewWillDisappear") // 7
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
count += 1
print("\(count)viewDidDisappear") // 8
}
}
