又到瞭總結的時間瞭,突然間感覺時間過得好快啊, 總覺的時間不夠用,但是這也沒辦法啊, 隻有自己擠時間瞭,雖然是零基礎,但是這並不能代表什麼啦,隻要努力,收獲總還是有的, 同時我也相信廣大的博友肯定也有同樣的感觸吧!
接下來就讓我來為大傢解讀我們今天所學習的內容吧,嘿嘿. 首先在上課剛開始時間,我們做瞭短短的練習, 對以往的知識有瞭進一步的瞭解, 也提高瞭熟練度, 但是時間總是很快的, 馬上我們就迎來瞭我們今天學習的新內容UINavigationControl!
首先讓我來介紹下UINavigationControl的創建方法吧:
1.創建導航控制器, 並指定導航控制器的RootViewController
2.設置導航控制器為rootViewController
具體創建過程我就用代碼來告訴大傢吧,如下:
FirstViewController *firstVC = [[FirstViewController alloc] init];
NSLog(@"第一個頁面初始化完成");
UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:firstVC];
[firstVC release];
NSLog(@"設置第一個頁面為導航控制器的rootViewController");
//步驟2.設置導航控制器為window的rootViewController
self.window.rootViewController = navC;
NSLog(@"設置導航控制器為window的RootViewController");
[navC release];
UINavigationControl,當行控制器, 繼承於UIViewController, 視圖控制器的視圖控制器, 用於管理伊利咧視圖控制器,被管理的視圖控制器以棧(先進後出, 後進先出)的形式儲存
每一個導航控制器都自帶一個navigationBar(導航條), UINavigationBar繼承於UIView, navigationBar是用於管理導航條的展現(iOS7之前是不透明的,之後就變為透明的啦)
同時我們也可以對導航條以及上面的東西進行設置, 具體方法如下:
//設置導航條是否半透明, 設置背景色,半透明失效
naviVC.navigationBar.translucent = YES;
//設置導航條上item的顏色
naviVC.navigationBar.tintColor = [UIColor purpleColor];
//設置導航條樣式
naviVC.navigationBar.barStyle = UIBarStyleBlack;
在之後我們便進入瞭本節課最為重要的瞭 那就是傳值問題, 在今天我們學習的方法中由屬性傳值和單例傳值.
單例傳值的創建方法為:
1.類方法
2.返回值類型是當前類
3.方法名:default + 類名
下面為大傢帶上今天的例子:
下面圖示為1 2 3步
– (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor purpleColor];
// Do any additional setup after loading the view.
self.navigationItem.title = @"主頁";
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 100, 60, 30)];
label.text = @"用戶名";
label.textAlignment = NSTextAlignmentRight;
[self.view addSubview:label];
[label release];
UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(20, 150, 60, 30)];
label1.text = @"性別";
label1.textAlignment = NSTextAlignmentRight;
[self.view addSubview:label1];
[label1 release];
field = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 200, 30)];
field.borderStyle = UITextBorderStyleRoundedRect;
field.placeholder = @"請輸入用戶名";
field.autocorrectionType = UITextAutocorrectionTypeNo;
field.spellCheckingType = UITextSpellCheckingTypeNo;
[self.view addSubview:field];
[field release];
field1 = [[UITextField alloc] initWithFrame:CGRectMake(100, 150, 200, 30)];
field1.borderStyle = UITextBorderStyleRoundedRect;
field1.placeholder = @"請輸入性別";
[self.view addSubview:field1];
[field1 release];
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(70, 200, 70, 30);
[button addTarget:self action:@selector(changPage:) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"登陸" forState:UIControlStateNormal];
[self.view addSubview:button];
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeSystem];
button1.frame = CGRectMake(180, 200, 70, 30);
[button1 addTarget:self action:@selector(changPage:) forControlEvents:UIControlEventTouchUpInside];
[button1 setTitle:@"取消" forState:UIControlStateNormal];
[self.view addSubview:button1];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(returnThekeyBorld:)];
[self.view addGestureRecognizer:tap];
[tap release];
//創建單例
// Single *single = [Single defaultSingle];
// NSLog(@"%@", single);
// Single *single1 = [Single defaultSingle];
// NSLog(@"%@", single1);
// Single *single2 = [Single defaultSingle];
// NSLog(@"%@", single2);
}
– (void)returnThekeyBorld:(UITapGestureRecognizer *)tap
{
for (UIView *view in self.view.subviews) {
if ([view class] == [UITextField class]) {
[view resignFirstResponder];
}
}
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
– (void)changPage:(UIButton *)button
{
Single *single = [Single defaultSingle];
single.nameString = field.text;
NSLog(@"%@", single.nameString);
HomeDetailViewController *detail = [[HomeDetailViewController alloc] init];
detail.nameString = [NSString stringWithFormat:@"歡迎%@ 性別%@登陸成功", field.text, field1.text];
[self.navigationController pushViewController:detail animated:YES];
[detail release];
}
– (void)viewDidLoad
{
self.view.backgroundColor = [UIColor redColor];
[super viewDidLoad];
// Do any additional setup after loading the view.
self.navigationItem.title = @"詳情頁";
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 200, 100)];
label.numberOfLines = 0;
label.center = self.view.center;
// label.text = _nameString;
Single *single = [Single defaultSingle];
label.text = single.nameString;
label.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:label];
[label release];
}
#import <Foundation/Foundation.h>
@interface Single : NSObject
@property (nonatomic, retain) NSString *nameString, *genderString;
//單例的創建方法
//1.類方法
//2.返回值類型是當前類
//3.方法名字:default + 類名
+ (Single *)defaultSingle;
#import "Single.h"
@implementation Single
+ (Single *)defaultSingle
{
static Single *single = nil;
if (single == nil) {
single = [[Single alloc] init];
}
return single;
}
– (void)dealloc
{
self.nameString = nil;
self.genderString = nil;
[super dealloc];
}