iOS入门（三十八） XML解析 JSON解析
@interface RootViewController : UIViewController//异步请求的协议
@property ( nonatomic , retain ) UIImageView * imageview ;
@property ( nonatomic , retain ) UIButton * buttongetE;
@property ( nonatomic , retain ) UIButton * buttonget;
@property ( nonatomic , retain ) UIButton * buttonpostE;
@property ( nonatomic , retain ) UIButton * buttonpost ;
//负责接收异步请求的数据
@property ( nonatomic , retain ) NSMutableData * dataa;
@end
@implementation RootViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[_imageview release];
[_buttonget release];
[_buttongetE release];
[_buttonpost release];
[_buttonpostE release];
[_dataa release];
[super dealloc];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.imageview = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 280, 280)];
self.imageview.backgroundColor = [UIColor cyanColor];
self.buttongetE = [[UIButton alloc] initWithFrame:CGRectMake(40, 350, 100, 30)];
self.buttongetE.backgroundColor = [UIColor cyanColor];
[self.buttongetE setTitle:@"同步GET" forState:UIControlStateNormal];
self.buttonget = [[UIButton alloc] initWithFrame:CGRectMake(40, 400, 100, 30)];
self.buttonget.backgroundColor = [UIColor cyanColor];
[self.buttonget setTitle:@"异步GET" forState:UIControlStateNormal];
self.buttonpostE = [[UIButton alloc] initWithFrame:CGRectMake(180, 350, 100, 30)];
self.buttonpostE.backgroundColor = [UIColor cyanColor];
[self.buttonpostE setTitle:@"同步POET" forState:UIControlStateNormal];
self.buttonpost = [[UIButton alloc] initWithFrame:CGRectMake(180, 400, 100, 30)];
self.buttonpost.backgroundColor = [UIColor cyanColor];
[self.buttonpost setTitle:@"异步POST" forState:UIControlStateNormal];
[self.view addSubview:_imageview];
[self.view addSubview:_buttonpostE];
[self.view addSubview:_buttonpost];
[self.view addSubview:_buttongetE];
[self.view addSubview:_buttonget];
[_imageview release];
[_buttonget release];
[_buttongetE release];
[_buttonpost release];
[_buttonpost release];
[self.buttonpost addTarget:self action:@selector(buttonClickedpost:) forControlEvents:UIControlEventTouchUpInside];
[self.buttonpostE addTarget:self action:@selector(buttonClickedpostE:) forControlEvents:UIControlEventTouchUpInside];
[self.buttonget addTarget:self action:@selector(buttonClickedget:) forControlEvents:UIControlEventTouchUpInside];
[self.buttongetE addTarget:self action:@selector(buttonClickedgetE:) forControlEvents:UIControlEventTouchUpInside];
}
- ( void ) buttonClickedgetE:(UIButton * ) button
{
NSLog(@"同步GET方法");
NSString * string = @"http://cdn.gq.com.tw.s3-ap-northeast-1.amazonaws.com/userfiles/images_A1/6954/2011100658141857.jpg";
NSURL * url = [NSURL URLWithString:string];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
[request setHTTPMethod:@"GET"];
NSURLResponse * re = nil;
NSError * error = nil;
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&re error:&error];
if (data != nil) {
UIImage * image = [UIImage imageWithData:data];
self.imageview.image = image;
}else {
NSLog(@"网络错误~");
}
}
- ( void ) buttonClickedget:(UIButton * ) button
{
NSLog(@"异步GET方法");
//1、生成一个请求对象
NSString * string = @"http://pic13.nipic.com/20110313/2686941_211532129160_2.jpg";
NSURL * url = [NSURL URLWithString:string];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
[request setHTTPMethod:@"GET"];
//2、 连接服务器，异步连接
[NSURLConnection connectionWithRequest:request delegate:self];
}
- ( void ) buttonClickedpostE:(UIButton * ) button
{
NSLog(@"同步POST方法");
NSString * string = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
NSURL * url = [NSURL URLWithString:string];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
[request setHTTPMethod:@"POST"];
//POST请求需要设置一个body
NSString * bodyStr = @"date=20131129&startRecord=1&len=30&udid=1234567890&terminalType=Iphone&cid=213";
NSData * bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:bodyData];
//2、 连接服务器
NSURLResponse * response = nil;
NSError * error = nil;
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
//3、对data做一些事情（转换为照片或者而文字）
if (data != nil) {
NSString * str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@",str);
[str release];
}
}
- ( void ) buttonClickedpost:(UIButton * ) button
{
NSLog(@"异步POST方法");
NSString * string = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
NSURL * url = [NSURL URLWithString:string];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
[request setHTTPMethod:@"POST"];
NSString * bodyStr = @"date=20131129&startRecord=1&len=30&udid=1234567890&terminalType=Iphone&cid=213";
NSData * bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:bodyData];
//连接服务器
// [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
// //在这个语法块中，前面小括号中的参数是可以直接使用的参数，data是已经请求完毕的数据
// NSString * str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
// NSLog(@"%@",str);
// }];
[NSURLConnection connectionWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
//代理实现的第一步： 获取到响应的httpheader
NSLog(@"我是接收响应的分界线~");
//每次接收到服务器响应的时候都创建一个新的Data对象
self.dataa = [NSMutableData data];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
//代理实现的第二步：获取数据
NSLog(@"我是接收数据的分界线");
//每次接收到服务器传来的小块data 都把它们拼接到dataa 之后
[self.dataa appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//代理实现的第三步：数据接收完毕
NSLog(@"我是接收完毕的小叮当~");
//当执行这个方法 的时候，意味着dataa已经是一个完整的data 可以使用
// UIImage * image = [UIImage imageWithData:self.dataa];
// self.imageview.image = image;
// NSString * str = [[NSString alloc] initWithData:self.dataa encoding:NSUTF8StringEncoding];
// NSLog(@"%@",str);
NSMutableDictionary * dic = [NSJSONSerialization JSONObjectWithData:self.dataa options:NSJSONReadingMutableContainers error:nil];
NSMutableArray * array = [dic objectForKey:@"news"];
for (NSDictionary * dicc in array) {
NSLog(@"%@",[dicc objectForKey:@"id"]);
NSLog(@"%@",[dicc objectForKey:@"title"]);
}
}