iOS UIViewController和UIView不同加载方
2019-01-09 本文已影响7人
羽裳有涯
加载UIViewController
-
通过XIB加载。
-
通过StoryBoard加载。
-
通过NSCoding协议加载。
-
通过代码加载。
用XIB加载UIViewController
首先看初始化代码：
- (IBAction)loadControllerFromXIB:(id)sender {
XIBViewController *xibVC = [[XIBViewController alloc]initWithNibName:@"XIBViewController" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:xibVC animated:YES];
}
当我们不实现loadView的时候打印结果:
2017-04-15 12:05:32.974 UIViewController和UIView生命周期加载和卸载[59883:1192231] initWithNibName
2017-04-15 12:05:32.987 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewDidLoad
2017-04-15 12:05:32.987 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewWillAppear
2017-04-15 12:05:32.996 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewWillLayoutSubviews
2017-04-15 12:05:32.997 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewDidLayoutSubviews
2017-04-15 12:05:33.002 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewWillLayoutSubviews
2017-04-15 12:05:33.002 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewDidLayoutSubviews
2017-04-15 12:05:33.506 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewDidAppear
2017-04-15 12:05:37.142 UIViewController和UIView生命周期加载和卸载[59883:1192231] clickButton
//pop以后
2017-04-15 12:05:42.334 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewWillDisappear
2017-04-15 12:05:42.837 UIViewController和UIView生命周期加载和卸载[59883:1192231] viewDidDisappear
2017-04-15 12:05:42.838 UIViewController和UIView生命周期加载和卸载[59883:1192231] dealloc
用Storyboard加载UIViewController
初始化代码：
- (IBAction)laodControllerFromSB:(id)sender {
UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Second" bundle:[NSBundle mainBundle]];
SBViewController *sbVC = [sb instantiateViewControllerWithIdentifier:@"SBViewController"];
[self.navigationController pushViewController:sbVC animated:YES];
}
运行结果：
2017-04-15 12:26:45.364 UIViewController和UIView生命周期加载和卸载[59932:1194239] initWithCoder
2017-04-15 12:26:45.365 UIViewController和UIView生命周期加载和卸载[59932:1194239] awakeFromNib
2017-04-15 12:26:45.368 UIViewController和UIView生命周期加载和卸载[59932:1194239] loadView
2017-04-15 12:26:45.368 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLoad
2017-04-15 12:26:45.368 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillAppear
2017-04-15 12:26:45.372 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillLayoutSubviews
2017-04-15 12:26:45.373 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLayoutSubviews
2017-04-15 12:26:45.877 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidAppear
//pop以后
2017-04-15 12:26:50.669 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillDisappear
2017-04-15 12:26:51.172 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidDisappear
2017-04-15 12:26:51.172 UIViewController和UIView生命周期加载和卸载[59932:1194239] dealloc
对于Storyboard，使用一个空的loadView没有影响。
用NSCodeing加载UIViewController
初始化代码：
//这里我就不实现NSCoding协议了，直接传入一个nil参数。
- (IBAction)loadControllerFromCoder:(id)sender {
CoderViewController *coderVC = [[CoderViewController alloc]initWithCoder:nil];
[self.navigationController pushViewController:coderVC animated:YES];
}
运行结果：
2017-04-15 12:30:25.962 UIViewController和UIView生命周期加载和卸载[59932:1194239] initWithCoder
2017-04-15 12:30:25.963 UIViewController和UIView生命周期加载和卸载[59932:1194239] loadView
2017-04-15 12:30:25.963 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLoad
2017-04-15 12:30:25.963 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillAppear
2017-04-15 12:30:25.967 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillLayoutSubviews
2017-04-15 12:30:25.967 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLayoutSubviews
2017-04-15 12:30:25.968 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillLayoutSubviews
2017-04-15 12:30:25.968 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLayoutSubviews
2017-04-15 12:30:26.470 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidAppear
//pop以后
2017-04-15 12:30:28.034 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillDisappear
2017-04-15 12:30:28.537 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidDisappear
2017-04-15 12:30:28.537 UIViewController和UIView生命周期加载和卸载[59932:1194239] dealloc
用代码加载UIViewController
初始化代码:
- (IBAction)loadControllerWithNone:(id)sender {
CodeViewController *codeVC = [[CodeViewController alloc]init];
[self.navigationController pushViewController:codeVC animated:YES];
}
运行结果：
2017-04-15 12:31:48.785 UIViewController和UIView生命周期加载和卸载[59932:1194239] initWithNibName
2017-04-15 12:31:48.786 UIViewController和UIView生命周期加载和卸载[59932:1194239] init
2017-04-15 12:31:48.787 UIViewController和UIView生命周期加载和卸载[59932:1194239] loadView
2017-04-15 12:31:48.787 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLoad
2017-04-15 12:31:48.788 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillAppear
2017-04-15 12:31:48.792 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillLayoutSubviews
2017-04-15 12:31:48.792 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLayoutSubviews
2017-04-15 12:31:48.792 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillLayoutSubviews
2017-04-15 12:31:48.792 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidLayoutSubviews
2017-04-15 12:31:49.293 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidAppear
//pop以后
2017-04-15 12:31:55.594 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewWillDisappear
2017-04-15 12:31:56.098 UIViewController和UIView生命周期加载和卸载[59932:1194239] viewDidDisappear
2017-04-15 12:31:56.098 UIViewController和UIView生命周期加载和卸载[59932:1194239] dealloc
加载UIView
用XIB加载UIView
初始化代码:
- (IBAction)loadViewFromXib:(id)sender {
XibView *xibView = [[[NSBundle mainBundle]loadNibNamed:@"XIBView" owner:self options:nil] lastObject];
[self.view addSubview:xibView];
}
运行结果：
2017-04-15 12:33:22.194 UIViewController和UIView生命周期加载和卸载[59932:1194239] initWithCoder
2017-04-15 12:33:22.195 UIViewController和UIView生命周期加载和卸载[59932:1194239] awakeFromNib
2017-04-15 12:33:22.195 UIViewController和UIView生命周期加载和卸载[59932:1194239] willMoveToWindow
2017-04-15 12:33:22.195 UIViewController和UIView生命周期加载和卸载[59932:1194239] willMoveToSuperview
2017-04-15 12:33:22.196 UIViewController和UIView生命周期加载和卸载[59932:1194239] didMoveToWindow
2017-04-15 12:33:22.196 UIViewController和UIView生命周期加载和卸载[59932:1194239] didMoveToSuperview
2017-04-15 12:33:22.197 UIViewController和UIView生命周期加载和卸载[59932:1194239] layoutSubviews
//这里是点击移除以后
2017-04-15 12:33:25.769 UIViewController和UIView生命周期加载和卸载[59932:1194239] willMoveToSuperview
2017-04-15 12:33:25.770 UIViewController和UIView生命周期加载和卸载[59932:1194239] willMoveToWindow
2017-04-15 12:33:25.771 UIViewController和UIView生命周期加载和卸载[59932:1194239] didMoveToWindow
2017-04-15 12:33:25.771 UIViewController和UIView生命周期加载和卸载[59932:1194239] didMoveToSuperview
2017-04-15 12:33:25.771 UIViewController和UIView生命周期加载和卸载[59932:1194239] dealloc
用代码加载UIView
初始化代码：
- (IBAction)loadViewWithNone:(id)sender {
CodeView *codeView = [[CodeView alloc]init];
codeView.backgroundColor = [UIColor greenColor];
codeView.frame = CGRectMake(0, 500, 100, 50);
[self.view addSubview:codeView];
}
运行结果：
2017-04-15 12:38:57.562 UIViewController和UIView生命周期加载和卸载[60323:1208772] initWithFrame
2017-04-15 12:38:57.562 UIViewController和UIView生命周期加载和卸载[60323:1208772] init
2017-04-15 12:38:57.562 UIViewController和UIView生命周期加载和卸载[60323:1208772] willMoveToWindow
2017-04-15 12:38:57.563 UIViewController和UIView生命周期加载和卸载[60323:1208772] willMoveToSuperview
2017-04-15 12:38:57.563 UIViewController和UIView生命周期加载和卸载[60323:1208772] didMoveToWindow
2017-04-15 12:38:57.563 UIViewController和UIView生命周期加载和卸载[60323:1208772] didMoveToSuperview
2017-04-15 12:38:57.564 UIViewController和UIView生命周期加载和卸载[60323:1208772] layoutSubviews
//点击移除以后
2017-04-15 12:39:02.751 UIViewController和UIView生命周期加载和卸载[60323:1208772] willMoveToSuperview
2017-04-15 12:39:02.752 UIViewController和UIView生命周期加载和卸载[60323:1208772] willMoveToWindow
2017-04-15 12:39:02.752 UIViewController和UIView生命周期加载和卸载[60323:1208772] didMoveToWindow
2017-04-15 12:39:02.752 UIViewController和UIView生命周期加载和卸载[60323:1208772] didMoveToSuperview
2017-04-15 12:39:02.752 UIViewController和UIView生命周期加载和卸载[60323:1208772] 点击移除
2017-04-15 12:39:02.753 UIViewController和UIView生命周期加载和卸载[60323:1208772] dealloc
总结
UIViewController不同加载方式钩子函数总结：
-
XIB加载方式
-
initWithNibName
-
loadView(
注意：如果实现一个空的方法，则XIB设置的属性无效，会覆盖XIB中的设置) -
viewDidLoad
-
-
Storyboard加载方式
-
initWithCoder
-
awakeFromNib
-
loadView(
实现是一个空方法或者不实现没有影响) -
viewDidLoad
-
-
NSCoding加载方式
-
initWithCoder
-
loadView
-
viewDidLoad
-
-
代码加载方式
-
initWithNibName
-
init(
这个是我初始化的时候主动调用,如果用initWithNibName传入nil参数则不会调用) -
loadView
-
viewDidLoad
-
我们可以发现，代码加载方式和XIB加载方式一模一样，如果有XIB则加载XIB，如果没有XIB则可以代码添加视图。
UIView不同加载方式钩子函数总结：
-
XIB加载方式
-
initWithCoder
-
awakeFromNib
-
willMoveToWindow
-
-
代码加载方式
-
initWithFrame(
设置frame。) -
init(
init方法调用) -
willMoveToWindow
-
我们发现，如果通过init初始化，然后手动设置Frame。则会导致上面的调用顺序。
