#import%20"FFHomeView.h"@implementation%20FFHomeView@synthesize%20delegate;@synthesize%20bookArray;@synthesize%20perDict;-%20(id)initWithFrame:(CGRect)frame%20{%20%20%20%20if%20((self%20=%20[super%20initWithFrame:frame]))%20{%20%20%20%20%20%20%20%20self.backgroundColor=[UIColor%20clearColor];%20%20%20%20}%20%20%20%20return%20self;}//%20Only%20override%20drawRect:%20if%20you%20perform%20custom%20drawing.//%20An%20empty%20implementation%20adversely%20affects%20performance%20during%20animation.-%20(void)drawRect:(CGRect)rect%20{%20%20%20%20NSInteger%20i=%200;%20%20%20%20%20%20%20%20NSUInteger%20count%20=%204;%20%20%20%20CGFloat%20width%20=%20self.frame.size.width%20/%20count;%20%20%20%20for%20(NSDictionary%20*dict%20in%20bookArray)%20{%20%20%20%20%20%20%20%20NSString%20*keypic=[dict%20objectForKey:@"image"];%20%20%20%20%20%20%20%20UIImage%20*image=[UIImage%20imageNamed:keypic];%20%20%20%20%20%20%20%20if%20(!image)%20{%20%20%20%20%20%20%20%20%20%20%20%20image%20=%20[UIImage%20imageNamed:@"defaultimage.png"]; } if (image) { CGRect frameImage=CGRectMake(172 *i+70,10, 112, 112); [[UIColor whiteColor]set]; [[UIColor colorWithRed:221/255.0 green:221/255.0 blue:221/255.0 alpha:1]set]; [[UIColor clearColor] set]; [image drawInRect:CGRectInset(frameImage,0,0)]; } [[UIColor colorWithRed:116/255.0 green:109/255.0 blue:88/255.0 alpha:1]set]; NSString *china=[NSString stringWithFormat:@"%@",[dict objectForKey:@"name"]]; [china drawInRect:CGRectMake(172 *i+30,125, width, 30) withFont:[UIFont boldSystemFontOfSize:15]
lineBreakMode:UILineBreakModeTailTruncation alignment:UITextAlignmentCenter]; i++; }}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { CGPoint pt = [[touches anyObject] locationInView:self]; NSUInteger width = self.bounds.size.width / 4; NSUInteger count = 0; for (NSMutableDictionary * dict in bookArray) { CGRect rect = CGRectMake(width * count++, 0,width, self.bounds.size.height); if (CGRectContainsPoint(rect, pt)) { //NSLog(@"dict %@",dict); perDict=dict; if(delegate && [delegate respondsToSelector:@selector(getPerSonProduct:)]){ [delegate getPerSonProduct:self]; return; } } }}- (void)dealloc { [super dealloc];}@end
看到这里我已经完全晕掉了，完全不知这个是用来干什么的？算了还是回到原来的路去吧，之前我们是看到了FFHomePageViewController.h。FFHomePageViewController.h是实现了FFHomeViewControllerDelegate接口，所以我们才会看到上述两个文件的。那现在我们来看下FFHomePageViewController.m的构造函数吧~
FFHomePageViewController.m ---> init构造函数（从这个构造函数可以发现bookData是用来存储bookMenu.plist加载到内存中的键值对的）
-(id)init { if(self= [super init]){ NSString *contentPath = [NSString stringByAppendDocumentDirectory:@"bookMenu.plist"]; bookData=[[NSMutableArray alloc] initWithContentsOfFile:contentPath]; } return self;}
FFHomePageViewController.m ---> loadView方法
//每次访问UIViewController的view(比如controller.view、self.view)而且view为nil，loadView方法就会被调用。- (void)loadView { [super loadView]; //指定view的背景颜色 self.view.backgroundColor=[UIColor colorWithRed:235/255.0 green:232/255.0 blue:222/255.0 alpha:1]; //Logo图片 UIImageView *upImage=[[UIImageView alloc] initWithFrame:CGRectMake(0,0, 768, 88)]; upImage.tag=51; [upImage setImage:[UIImage imageNamed:@"Ipadup"]]; [self.view addSubview:upImage]; [upImage release]; //TableView放一些菜单图标 UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 88, 768, 830-5) style:UITableViewStylePlain]; [tableView setDelegate:self]; [tableView setDataSource:self]; [tableView setTag:111110]; tableView.separatorStyle=UITableViewCellSeparatorStyleNone; tableView.separatorColor=[UIColor clearColor]; [tableView setBackgroundColor:[UIColor clearColor]]; [self.view addSubview:tableView]; [tableView release]; }
话说FFHomePageViewController.h是实现UITableViewDataSource接口和UITableViewDelegate接口的，又通过[tableView setDelegate:self]，[tableView setDataSource:self]语句，表示只要在FFHomePageViewController.m当前类重写那些方法就可以了。
UITableViewDataSource，主要为UITableView提 供显示用的数据(UITableViewCell)，指定UITableViewCell支持的编辑操作类型(insert，delete和 reordering)，并根据用户的操作进行相应的数据更新操作，如果数据没有更具操作进行正确的更新，可能会导致显示异常，甚至crush。
UITableViewDelegate，主要提供一些可选的方法，用来控制tableView的选择、指定section的头和尾的显示以及协助完成cell的删除和排序等功能。
接下来看下渲染每一个cell的方法
FFHomePageViewController.m ---> - (UITableViewCell *)tableView:(UITableView *)tableView1 cellForRowAtIndexPath:(NSIndexPath *)indexPath
//初始化每一行会调用该方法- (UITableViewCell *)tableView:(UITableView *)tableView1 cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = nil; static NSString *kCellTextField1 = @"Cell"; cell = [tableView1 dequeueReusableCellWithIdentifier:kCellTextField1]; if (cell==nil) { if (indexPath.section==0) { //初始化Image UIImage * bgImage = nil; bgImage = [[UIImage imageNamed:@"shuguiback.png"] stretchableImageWithLeftCapWidth:0 topCapHeight:34]; cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kCellTextField1] autorelease]; cell.selectionStyle = UITableViewCellSelectionStyleNone; cell.accessoryType=UITableViewCellAccessoryNone; //自定义的FFHomeView类构造函数返回自己本身 FFHomeView *drawFriends=[[FFHomeView alloc]initWithFrame:CGRectMake(0, 0,320, 160)]; [drawFriends setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight]; [drawFriends setTag:1]; //FFHomeView的delegate就是FFHomeViewControllerDelegate //而当前类就是实现FFHomeViewControllerDelegate接口的。就是把FFHomeView中要做的事，交给当前类 [drawFriends setDelegate:self]; [drawFriends setUserInteractionEnabled:YES]; [cell.contentView addSubview:drawFriends]; [drawFriends release]; cell.backgroundView=[[UIImageView alloc]initWithImage:bgImage]; } } //这里还没怎么看的明白 if (indexPath.section==0) { if (bookData) { NSUInteger count = [bookData count]; NSUInteger length = indexPath.row * ROWCALUE_NUMBER + ROWCALUE_NUMBER > count?count - indexPath.row * ROWCALUE_NUMBER:ROWCALUE_NUMBER; NSArray * array = [bookData subarrayWithRange:NSMakeRange(indexPath.row * ROWCALUE_NUMBER , length)]; if (array) { FFHomeView * view1 = (FFHomeView * )[cell.contentView viewWithTag:1]; view1.bookArray=array; //setNeedsDisplay会调用自动调用drawRect方法 [view1 setNeedsDisplay]; } } } return cell;}
看了这个方法后差不多也明白了之前的FFHomeView.m文件做的是什么事情了，按照java的理解方式是这样的。就相当于在FFHomeView类中写了一个事件接口FFHomeViewControllerDelegate，在该类的touchesEnded事件函数中回调FFHomeViewControllerDelegate接口里的getPerSonProduct方法。而getPerSonProduct方法真正的实现而在FFHomePageViewController类当中。
然后调用顺序就是：
当我们触发菜单栏的图标--->调用FFHomeView里的touchesEnded事件--->再调用到FFHomePageViewController里的getPerSonProduct事件
FFHomePageViewController.m ---> getPerSonProduct方法
-(void)getPerSonProduct:(FFHomeView *)controllerRenqi{ //在FFHomeView内部调用该函数的时候把自己本身传入，而自己本身包含perDict键值对 //<dict><key>url</key><string>/index.php/cms/item-hjindex</string></dict> NSString *stringURL=[controllerRenqi.perDict objectForKey:@"url"]; if ([stringURL isEqualToString:@"exit"]) { //若退出，显示登陆界面 FFLrcController *publish = [[FFLrcController alloc]init]; UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:publish]; [self presentModalViewController:nav animated:NO]; //每次使用完controller都释放掉 [publish release]; return; } NSString *createurl=[controllerRenqi.perDict objectForKey:@"createurl"]; //WebViewController FFFFWebViewController * web=[[FFFFWebViewController alloc] init:stringURL createURL:createurl]; NSString *name=[controllerRenqi.perDict objectForKey:@"name"]; web.TT=name; web.hidesBottomBarWhenPushed=YES; [self.navigationController pushViewController:web animated:YES]; [web release]; }
看完上面这些代码后，发现接下来的视图传入的是WebViewController，参数是url。我想这个一定是传说中的app中加个webview。大部分操作可能会由webview来实现。
另外我想你会跟我一样有这样的一些问题，createurl是什么？干什么用？不急不急，接下来来看看FFFFWebViewController 是怎么实现的。
#import <UIKit/UIKit.h>#import "FFFFSwitchViewController.h"//发现这个类是继承UIViewController，并实现了UIWebViewDelegate接口@interface FFFFWebViewController : UIViewController <UIWebViewDelegate>{ //浏览器 UIWebView * webView; //UIActivityIndicatorView实例提供轻型视图，这些视图显示一个标准的旋转进度轮。 UIActivityIndicatorView *activityIndicator; NSString *stringUrl; NSString *createUrl; NSString *TT;}@property(nonatomic,retain)NSString *TT; @property(nonatomic,retain)NSString *stringUrl;@property(nonatomic,retain)NSString *createUrl;-(id)init:(NSString *)string createURL:(NSString*)curl;//-(void)loadWebView:(NSString*)string;@end
FFFFWebViewControlle.h主要就是实现了 UIWebViewDelegate委托接口，UIWebViewDelegate主要有下面几个方法。
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; //加载前
- (void)webViewDidStartLoad:(UIWebView *)webView;//开始发送请求(加载数据)时调用这个方法
- (void)webViewDidFinishLoad:(UIWebView *)webView;//请求完毕(加载数据完毕)时调⽤这个方法
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error;//请求错误时调用这个方法
FFFFWebViewController.m ---> init构造函数方法
//第一个参数为：要显示的地址-(id)init:(NSString *)string createURL:(NSString*)curl{ if(self=[super init]){ self.stringUrl=[[NSString stringWithFormat:@"%@%@", @"http://xxxxx/hjjd", string]
stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; self.createUrl = curl; } return self;}
FFFFWebViewController.m ---> loadView方法
- (void)loadView { [super loadView]; self.view.backgroundColor=[UIColor colorWithRed:235/255.0 green:232/255.0 blue:222/255.0 alpha:1]; //存放logo UIImageView *uv=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 768, 60)]; uv.tag=1; [uv setImage:[UIImage imageNamed:@"Ipadnavigation"]]; [self.view addSubview:uv]; [uv release]; //返回按钮 UIButton *check = [UIButton buttonWithType:UIButtonTypeCustom]; check.tag=2; check.frame =CGRectMake(10, 22, 48, 30); [check.titleLabel setFont:[UIFont boldSystemFontOfSize:14]]; [check setTitle:@"返回" forState:UIControlStateNormal]; //点击后出发goBack事件 [check addTarget:self action:@selector(goBack) forControlEvents:UIControlEventTouchDown]; [check setBackgroundImage:[UIImage imageNamed:@"IpadnClose"] forState:UIControlStateNormal]; [self.view addSubview:check]; //新建按钮 if(![self.createUrl isEqualToString:@"null"]){ UIButton *upButton = [UIButton buttonWithType:UIButtonTypeCustom]; upButton.tag=3; upButton.frame =CGRectMake(768-58, 22, 48, 30); [upButton setTitle:@"新建" forState:UIControlStateNormal]; [upButton.titleLabel setFont:[UIFont boldSystemFontOfSize:14]]; //点击后触发resum事件 [upButton addTarget:self action:@selector(resum) forControlEvents:UIControlEventTouchDown]; [upButton setBackgroundImage:[UIImage imageNamed:@"IpadnClose"] forState:UIControlStateNormal]; [self.view addSubview:upButton]; } //标题 UILabel *titleLabel=[[UILabel alloc]initWithFrame:CGRectMake(0,23,768,30)]; titleLabel.tag=4; [titleLabel setFont:[UIFont boldSystemFontOfSize:20]]; [titleLabel setTextAlignment:UITextAlignmentCenter]; titleLabel.lineBreakMode=UILineBreakModeWordWrap; titleLabel.numberOfLines=0; titleLabel.text =TT; [titleLabel setTextColor:[UIColor whiteColor]]; [titleLabel setBackgroundColor:[UIColor clearColor]]; [self.view addSubview:titleLabel]; [titleLabel release]; webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 60, 768, 1024-20-88-88+60)]; webView.scalesPageToFit = YES; //设置delegate为本身，因为该类实现UIWebViewDelegate接口 webView.delegate = self; webView.backgroundColor = [UIColor clearColor]; [self.view addSubview:webView];
activityIndicator = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(0, 15, 50, 50)]; [activityIndicator setCenter:CGPointMake(768/2,1024/2)]; [activityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray]; [self.view addSubview:activityIndicator]; //加载链接地址 [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.stringUrl]]];}
FFFFWebViewController.m ---> resum事件
-(void)resum{ FFcreateViewContonroller *matchset=[[FFcreateViewContonroller alloc]init:self.createUrl]; matchset.TT=[NSString stringWithFormat:@"新建%@",TT]; [self presentModalViewController:matchset animated:YES]; [matchset release];}
FFFFWebViewController.m ---> goBack事件
- (void)goBack { //假如浏览器可以goBack就先goBack if([webView canGoBack]){ [webView goBack]; }else{ //否则弹出controller [self.navigationController popViewControllerAnimated:YES]; }}
从上面的代码就可以看出createurl是用来做什么的了，假如我们点击右上角的新建按钮，createurl可以让webview转跳到自己定义的页面当中。另外假如自己需要controller之间的转跳，则只要在新建点击后判断createurl的内容，就可以任意转跳到自己的地方了。到这里差不多可以看懂原作者的app设计思路是怎么样的了。这里点击新建后会进入
FFcreateViewContonroller。FFcreateViewContonroller其实与FFFFWebViewController非常的相似，也就是嵌入一个webview。
源代码已经分析的差不多了，稍微的总结那么一下。
这个项目的顺序是这样的：AppDelegate_iPad--->FFADSViewController--->FFLrcController
--->FFFFSwitchViewControoler(FFHomePageViewController,FFCamera,FFVideo,FFshezhi)
由FFHomePageViewController出发：FFHomePageViewController--->FFFFWebViewController--->FFcreateViewContonroller
假如要添加某个新功能的话，就可以新建一个controller，然后在resum方法中添加一个判断引导到新建controller就可以了。若需要在新建的controller下面再进入新的controller其实也无妨，popViewController后FFFFWebViewController始终还会在那边的。若新建按钮需要对webview中的内容进行重定向，那就更简单了，直接在resum方法中调用webview的loadRequest方法，填入需要转跳的url就可以了。
到这里文章已经写完了，写的不好希望大家指出！谢谢大家观看~
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