[IOS]UIWebView實作儲存頁面和讀取伺服器端json資料如何通過viewView儲存通路過的頁面？和如何擷取并解析伺服器端發送過來的json資料？通過一個簡單的Demo來學習一下吧！操作步驟：結果：

#import "ViewController.h"

@interfaceViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

    [superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    //請求網絡頁面

//    NSURLRequest * request = [NSURLRequest requestWithURL:url];

//    [self.webview loadRequest:request];

//    

//    //html加載本地網頁

//    NSString * str = [[NSBundle mainBundle] pathForResource:@"百度圖檔—全球最大中文圖檔庫" ofType:@"html"];

//    str = [NSString stringWithContentsOfFile:str encoding:NSUTF8StringEncoding error:nil];

//    NSLog(@"%@",str);

//    [self.webview loadHTMLString:str baseURL:[[NSBundle mainBundle]bundleURL]];

    self.label.text =@"正在請求資料";

    //step1:請求位址

    //儲存頁面

   //通路伺服器擷取json資料

    NSString * urlString =@"http://www.weather.com.cn/data/cityinfo/101020100.html";

    NSURL * url = [NSURLURLWithString:urlString];

    //step2:執行個體化一個request

    NSURLRequest * request = [NSURLRequestrequestWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:30.0];

    //step3:建立連結

    self.connection = [[NSURLConnectionalloc]initWithRequest:request delegate:self];

    if(self.connection)

    {

        NSLog(@"建立連結成功");

    }else{

        NSLog(@"建立連結失敗");

    }

    [url release];

    [urlString release];

}

- (void)didReceiveMemoryWarning

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

- (void)dealloc {

    [_webview release];

    [_searchTextrelease];

    [_label release];

    [super dealloc];

//擷取資料

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

    //接受一個服務端回話，再次一般初始化接受資料的對象

    //NSLog(@"傳回資料類型%@",[response ]);

    //NSLog(@"傳回資料編碼%@",[response text]);

    NSMutableData * data = [[NSMutableDataalloc]init];

    self.data = data;

    [data release];

//不斷的擷取資料

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

    //接受傳回資料，這個方法可能會被調用多次，是以将多次傳回資料加起來

    NSInteger datalength = [datalength];

    NSLog(@"傳回資料量：%d",datalength);

    [self.dataappendData:data];

//擷取檔案位址

-(NSString *)dataFilePath:(NSString*)fileName

    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);

    NSString *document=[pathsobjectAtIndex:0];

    return [documentstringByAppendingPathComponent:fileName];

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

//    //連接配接結束

    NSLog(@"%d",[self.datalength]);

    self.label.text =@"請求結束";

    //可以下載下傳圖檔

    //[self.data writeToFile:[self dataFilePath:@"image.jpg"] atomically:YES];

    NSString * mystr = [[NSStringalloc]initWithData:self.dataencoding:NSUTF8StringEncoding];

    [mystr writeToFile:[selfdataFilePath:@"百度圖檔—全球最大中文圖檔庫.html"] atomically:YES encoding:NSUTF8StringEncoding error:nil];

    NSLog(@"最後的結果%@",mystr);

    [mystr release];

//    NSDictionary *weather = [NSJSONSerialization JSONObjectWithData:self.data options:NSJSONReadingMutableContainers  error:nil];

//    NSLog(@"%@",weather);

//    [weather writeToFile:[self dataFilePath:@"weather.plist"] atomically:YES];

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

    self.label.text =@"連接配接失敗";

- (IBAction)searchClick:(id)sender {

2013-08-27 16:09:18.821 WebViewDemo[673:c07] 建立連結成功

2013-08-27 16:09:19.161 WebViewDemo[673:c07] 傳回資料量：153

2013-08-27 16:09:19.161 WebViewDemo[673:c07] 153

2013-08-27 16:09:19.193 WebViewDemo[673:c07] 最後的結果{"weatherinfo":{"city":"上海","cityid":"101020100","temp1":"32℃","temp2":"27℃","weather":"多雲","img1":"d1.gif","img2":"n1.gif","ptime":"11:00"}}

==================== 迂者 丁小未 CSDN部落格專欄=================

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