iphone学习笔记--使用http与服务器端通信

来源：互联网发布：php 字符型转变为数值编辑：程序博客网时间：2024/05/29 08:43

与服务器端的通信的方式有两种：1).http 2).socket 3).webservice

下面是在iphone平台上使用http与服务器端通信，费话不说，直接代码。

1. 创建一个基于视图的应用程序，并命名(这里命名为NetDemo)，打开NetDemoViewController.h文件，代码如下：

#import <UIKit/UIKit.h>@interface NetDemoViewController : UIViewController{UIButton *btn;NSMutableData *receviedData;}@property (nonatomic, retain)IBOutlet UIButton *btn;@property (nonatomic, retain) NSMutableData *receviedData;-(IBAction) btnPressed:(id)sender;@end

修改之后，保存。

2. 打开NetDemoViewController.m文件，代码实现如下：

#import "NetDemoViewController.h"@implementation NetDemoViewController@synthesize btn;@synthesize receviedData;- (IBAction)btnPressed:(id)sender{NSString *param = [NSString stringWithFormat:@"action=%@&username=%@&password=%@",@"login",@"netdemo"];NSData *postData = [param dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];[request setURL:[NSURL URLWithString:@"http://www.xxx.com/post.php"]];[request setHTTPMethod:@"POST"];[request setHTTPBody:postData];NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];if(conn){if (receviedData != nil ) {[receviedData release];}receviedData = [[NSMutableData alloc] init];}[conn release];}#pragma mark -#pragma mark NSURLConnectionDelegate- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{[receviedData appendData:data];}- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{NSLog(@"connection error: %@",[NSMutableString stringWithFormat:@"%@",error]);}- (void) connectionDidFinishLoading:(NSURLConnection *)connection{NSString *result = nil;@try {result = [[NSString alloc] initWithBytes:[receviedData bytes] length:[receviedData length] encoding:NSUTF8StringEncoding];NSLog(@"%@",result);}@catch (NSException * e) {NSLog(@"%@",[NSString stringWithFormat:@"%@",e]);}@finally {[result release];}}- (void)viewDidUnload {     // Release any retained subviews of the main view.     // e.g. self.myOutlet = nil;}- (void)dealloc {     [receviedData release];        [super dealloc];}@end

3. 选中NetDemoViewController.xib文件，双击打开，添加一UIButton控件，绑定到btn输出口，再给Touch up side绑定btnPressed事件，保存退出。

运行程序，正常情况下OK，打开Consle看输出结果。