iOS开发学习笔记OC语言UIView和UIViewController生命周期是什么？
摘要：UIView 生命周期 #import "ViewController.h" @interface TestView: UIView @end @implementation TestVi
UIView 生命周期
#import "ViewController.h"
@interface TestView: UIView
@end
@implementation TestView
- (instancetype)init{
self = [super init];
if (self) {
}
return self;
}
- (void)willMoveToSuperview:(nullable UIView *)newSuperview {
[super willMoveToSuperview:newSuperview];
}
- (void)didMoveToSuperview {
[super didMoveToSuperview];
}
- (void)willMoveToWindow:(nullable UIWindow *)newWindow {
[super willMoveToWindow:newWindow];
}
- (void)didMoveToWindow {
[super didMoveToWindow];
}
@end
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
TestView *view = [[TestView alloc] init];
view.backgroundColor = [UIColor redColor];
view.frame = CGRectMake(100, 100, 100, 100);
[self.view addSubview:view];
}
@end
通过断点调试，可以发现生命周期是：
init
willMoveToSuperview
didMoveToSuperview
willMoveToWindow
didMoveToWindow
UIViewController 生命周期
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (instancetype)init {
self = [super init];
if (self) {
}
return self;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
UIView *view = [[UIView alloc] init];
view.backgroundColor = [UIColor redColor];
view.frame = CGRectMake(100, 100, 100, 100);
[self.view addSubview:view];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
@end
通过断点调试，可以发现生命周期是：
init
viewDidLoad
viewDidAppear
如果移除，顺序是：
viewWillDisappear
viewDidDisappear