Asynchronous request HTTP

代码：

@interface HttpProcessor : NSObject <NSURLConnectionDataDelegate>{    NSMutableData *buffer;}@property BOOL finished;@property (strong, nonatomic) NSString *html;@end@implementation HttpProcessor@synthesize finished;@synthesize html;-(id)init{    if (self) {        finished = NO;    }        return self;}// 开始接收响应-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    finished = NO;    buffer = [[NSMutableData alloc] init];}// 接收ing , 可能多次调用-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [buffer appendData:data];}// 结束响应-(void)connectionDidFinishLoading:(NSURLConnection *)connection{    finished = YES;    html = [[NSString alloc] initWithData:buffer encoding:NSUTF8StringEncoding];    //NSLog(@"%@", html);    NSLog(@"OK");}@endvoid request(NSString *urlString){    NSLog(@"BEGIN");    // make request object    NSURL *url = [[NSURL alloc]initWithString:urlString];    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url];    [request setHTTPMethod:@"GET"];    [request setTimeoutInterval:10];        // send request    HttpProcessor *processor = [[HttpProcessor alloc]init];    [NSURLConnection connectionWithRequest:request delegate:processor];}

 代码块：

void request(NSString *urlString){    NSLog(@"BEGIN");    // make request object    NSURL *url = [[NSURL alloc]initWithString:urlString];    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url];    [request setHTTPMethod:@"GET"];    [request setTimeoutInterval:10];    // send request    [NSURLConnection     sendAsynchronousRequest:request     queue:[NSOperationQueue mainQueue]     completionHandler:        ^(NSURLResponse *response, NSData *result, NSError *error)        {            //只会进入一次，方法内部已经实现了Buffer作用            NSString *html = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];            NSLog(@"html = %@", html);        }          ];}

参考：

http://www.tuicool.com/articles/2Yru6f

 

异步请求HTTP