iOS开发之应用首次启动显示用户引导

这个功能的重点就是在如何判断应用是第一次启动的. 其实很简单

我们只需要在一个类里面写好用户引导页面  基本上都是使用uiscrollview 来实现,

新建一个继承于uiviewcontroller的类 命名为 userguideviewcontroller ,

在userguideviewcontroller.m 写

 1 - (void)viewdidload
 2 {
 3     [super viewdidload];
 4     // do any additional setup after loading the view.
 5     self.view.backgroundcolor = [uicolor redcolor];
 6    
 7     [self initguide];   //加载新用户指导页面
 8 }
 9
10 - (void)initguide
11 {
12     uiscrollview *scrollview = [[uiscrollview alloc] initwithframe:cgrectmake(0, 0, 320, 640)];
13     [scrollview setcontentsize:cgsizemake(1280, 0)];
14     [scrollview setpagingenabled:yes];  //视图整页显示
15     //    [scrollview setbounces:no]; //避免弹跳效果,避免把根视图露出来
16    
17     uiimageview *imageview = [[uiimageview alloc] initwithframe:cgrectmake(0, 0, 320, 460)];
18     [imageview setimage:[uiimage imagenamed:@"0.png"]];
19     [scrollview addsubview:imageview];
20     [imageview release];
21    
22     uiimageview *imageview1 = [[uiimageview alloc] initwithframe:cgrectmake(320, 0, 320, 460)];
23     [imageview1 setimage:[uiimage imagenamed:@"1.png"]];
24     [scrollview addsubview:imageview1];
25     [imageview1 release];
26    
27     uiimageview *imageview2 = [[uiimageview alloc] initwithframe:cgrectmake(640, 0, 320, 460)];
28     [imageview2 setimage:[uiimage imagenamed:@"2.png"]];
29     [scrollview addsubview:imageview2];
30     [imageview2 release];
31    
32     uiimageview *imageview3 = [[uiimageview alloc] initwithframe:cgrectmake(960, 0, 320, 460)];
33     [imageview3 setimage:[uiimage imagenamed:@"3.png"]];
34     imageview3.userinteractionenabled = yes;    //打开imageview3的用户交互;否则下面的button无法响应
35     [scrollview addsubview:imageview3];
36     [imageview3 release];
37    
38     uibutton *button = [uibutton buttonwithtype:uibuttontypecustom];//在imageview3上加载一个透明的button
39     [button settitle:nil forstate:uicontrolstatenormal];
40     [button setframe:cgrectmake(46, 371, 230, 37)];
41     [button addtarget:self action:@selector(firstpressed) forcontrolevents:uicontroleventtouchupinside];
42     [imageview3 addsubview:button];
43    
44     [self.view addsubview:scrollview];
45     [scrollview release];
46 }
button的方法

1 - (void)firstpressed
2 {
3     [self presentmodalviewcontroller:[[[weiboviewcontroller alloc] init] autorelease] animated:yes];  //点击button跳转到根视图
4 }
 

至于添加button是因为我的用户引导最后一个页面有一个画上去的button,写着 开始使用  我在上面添加一个透明的button 用以实现调用方法

 

打开appdelegate.m

首先引入头文件

1 #import "userguideviewcontroller.h"
2 #import "weiboviewcontroller.h"
weiboviewcontroller是我的根视图application: didfinishlaunchingwithoptions: 方法内进行判断

 1 - (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions
 2 {
 3     self.window = [[[uiwindow alloc] initwithframe:[[uiscreen mainscreen] bounds]] autorelease];
 4     // override point for customization after application launch.
 5    
 6     //判断是不是第一次启动应用
 7     if(![[nsuserdefaults standarduserdefaults] boolforkey:@"firstlaunch"])
 8     {
 9         [[nsuserdefaults standarduserdefaults] setbool:yes forkey:@"firstlaunch"];
10         nslog(@"第一次启动");       
11         //如果是第一次启动的话,使用userguideviewcontroller (用户引导页面) 作为根视图
12         userguideviewcontroller *userguideviewcontroller = [[userguideviewcontroller alloc] init];
13         self.window.rootviewcontroller = userguideviewcontroller;
14         [userguideviewcontroller release];
15     }
16     else
17     {
18         nslog(@"不是第一次启动");
19         //如果不是第一次启动的话,使用loginviewcontroller作为根视图
20         weiboviewcontroller *weiboviewcontroller = [[weiboviewcontroller alloc] init];
21         self.window.rootviewcontroller = weiboviewcontroller;
22         [weiboviewcontroller release];
23
24     }
25    
26     self.window.backgroundcolor = [uicolor whitecolor];
27     [self.window makekeyandvisible];
28     return yes;
29 }