UI 03 UIViewController (视图控制器)的7个方法与视图的跳转
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内容图文
新建一个继承于UIViewController 的类
在AppDelegate.m 中写如下代码.
//1.创建一个rootViewController对象
RootViewController *rootVC = [[RootViewController alloc]init];
//2.给window设置根视图控制器self.window.rootViewController = rootVC;
[rootVC release];
在RootViewController.m文件中的代码如下
#import "RootViewController.h"
#define HEIGHT self.view.frame.size.height
#import "SecondViewController.h"
@interface
RootViewController ()
@property(nonatomic,retain)NSMutableArray *arr;
@end@implementationRootViewController// UIViewController的方法完整有7个,如下://1.初始化方法,这个方法一般自己就调用了,不需要我们再额外调用.会初始化一些容器,比如数组,字典等.
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.arr = [NSMutableArray array];
}
//打印出当前方法名NSLog(@"%s",__FUNCTION__);
returnself;
}
//2.self.view 的加载,什么时候用到什么时候触发方法.
- (void)loadView
{
[super loadView];
NSLog(@"%s",__FUNCTION__);
}
#pragma mark 如果想重写父类的方法,首先先用super去调用父类的方法,这样可以保证原功能不变,然后在方法里再写新添加的功能;//3.前三个方法是同时触发的,一般代码写在这个方法中.
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor yellowColor];
// NSLog(@"%s",__FUNCTION__);// 视图的跳转:
**UIButton * button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(100, 500, 50, 40);
[button setTitle:@"下一页" forState:UIControlStateNormal];
[self.view addSubview:button];
[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
button.layer.borderWidth = 1;
button.layer.cornerRadius = 10 ;
button.backgroundColor = [UIColor cyanColor];**
}
- (void)click:(UIButton *)button
{
//随机颜色// self.view.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1]; //创建一个secondVC的对象
SecondViewController *secondVC = [[SecondViewController alloc]init];
//设置一下跳转的时候动画效果
[secondVC setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
//进行跳转
[self presentViewController:secondVC animated:YES completion:^{
}];
//内存管理
[secondVC release];
}
//4.视图将要出现#pragma mark 视图将要出现
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSLog(@"%s",__FUNCTION__);
}
//5.视图已经出现#warning 这个方法是视图已经出现
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
NSLog(@"%s",__FUNCTION__);
}
//6.视图将要消失
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
NSLog(@"%s",__FUNCTION__);
}
//7.视图已经消失
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
NSLog(@"%s",__FUNCTION__);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/@end
下面的代码是在SecondViewController.m 中关于视图的跳回的代码.
#import "SecondViewController.h"
@interface
SecondViewController ()
@end
@implementation
SecondViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor whiteColor];
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(100, 100, 100, 100);
button.layer.borderWidth = 1;
button.layer.cornerRadius = 10;
[self.view addSubview:button];
[button setTitle:@"返回" forState:UIControlStateNormal];
[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)click:(UIButton *)button
{
//点击返回到前一个页面
[self dismissViewControllerAnimated:YES completion:^{
}];
}
版权声明:本文为博主原创文章,未经博主允许不得转载。
原文:http://blog.csdn.net/gao_zi/article/details/47282419
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