直奔核心:
#import "TechnologyDetailViewController.h"#define kScreenWidth [UIScreen mainScreen].bounds.size.width#define kScreenHeight [UIScreen mainScreen].bounds.size.height@interface TechnologyDetailViewController ()@property (nonatomic,retain)UIWebView *webView;//显示详情页面@end@implementation TechnologyDetailViewController- (void)dealloc{self.webView = nil;self.ids = nil;[super dealloc];}- (void)viewDidLoad {[super viewDidLoad];//设置背景self.view.backgroundColor = [UIColor yellowColor];//调用请求网络数据[self readDataFromNetWork];// self.automaticallyAdjustsScrollViewInsets = NO;[self.view addSubview:self.webView];}
懒加载UIWebView
//懒加载- (UIWebView *)webView{if (!_webView) {self.webView = [[[UIWebView alloc]initWithFrame:CGRectMake(0,0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)]autorelease];self.webView.backgroundColor = [UIColor orangeColor];}return [[_webView retain ]autorelease];}核心代码如下:
//解析数据- (void)readDataFromNetWork{NSString *str = [NSString stringWithFormat:@"%@/full.html",self.ids];NSURL *url = [NSURL URLWithString:str];NSURLRequest *request = [NSURLRequest requestWithURL:url];[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];NSString *body = dic[self.ids][@"body"];NSString * title = dic[self.ids][@"title"];NSString *digest = dic[self.ids][@"digest"];NSString *ptime = dic[self.ids][@"ptime"];NSString * source = dic[self.ids][@"source"];NSArray * img = dic[self.ids][@"img" ] ;//NSLog(@"%@",img);if (img.count) {for (int i = 0; i < img.count; i ++) {NSString *imgString = [NSString stringWithFormat:@"<p style=\&;text-align:center\&;><img src=\&;%@\&; /></p>",img[i][@"src"]];NSLog(@"imString = %@",imgString);imgString = [imgString stringByReplacingOccurrencesOfString:@"<!–IMG#%d–>" withString:imgString];body = [imgString stringByAppendingString:body];}}//NSLog(@"body = %@",body);//借助第三方进行排版NSString *filePath = [[NSBundle mainBundle]pathForResource:@"topic_template" ofType:@"html"];NSString *htmlString = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__BODY__" withString:body];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__TITLE__" withString:title];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__AUTHOR__" withString:source];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__DIGEST__" withString:digest];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__TIME__" withString:ptime];htmlString = [htmlString stringByReplacingOccurrencesOfString:@"__PTIME__" withString:ptime];[self.webView loadHTMLString:htmlString baseURL:nil];}];}
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实在看不懂再看下demol例子:
UIWebView的loadRequest可以用来加载一个url地址，它需要一个NSURLRequest参数。我们定义一个方法用来加载url。在UIWebViewDemoViewController中定义下面方法：
– (void)loadWebPageWithString:(NSString*)urlString{NSURL *url =[NSURL URLWithString:urlString];NSLog(urlString);NSURLRequest *request =[NSURLRequest requestWithURL:url];[webView loadRequest:request];}
在界面上放置3个控件，一个textfield、一个button、一个uiwebview，布局如下：
在代码中定义相关的控件：webView用于展示网页、textField用于地址栏、activityIndicatorView用于加载的动画、buttonPress用于按钮的点击事件。
@interface UIWebViewDemoViewController :UIViewController<UIWebViewDelegate> {IBOutlet UIWebView *webView;IBOutlet UITextField *textField;UIActivityIndicatorView *activityIndicatorView;}- (IBAction)buttonPress:(id) sender;- (void)loadWebPageWithString:(NSString*)urlString;@end
使用IB关联他们。
设置UIWebView，初始化UIActivityIndicatorView：
– (void)viewDidLoad{[super viewDidLoad];webView.scalesPageToFit =YES;webView.delegate =self;activityIndicatorView = [[UIActivityIndicatorView alloc]initWithFrame : CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)] ;[activityIndicatorView setCenter: self.view.center] ;[activityIndicatorView setActivityIndicatorViewStyle: UIActivityIndicatorViewStyleWhite] ;[self.view addSubview : activityIndicatorView] ;[self buttonPress:nil];// Do any additional setup after loading the view from its nib.}
UIWebView主要有下面几个委托方法：
人生就像一场旅行，不必在乎目的地，
