Block封装http请求

－－－－－－－－－－－－－－－封装请求－－－－－－－－－－－－－－－－－－－－

CustomRequest类 .h

#import <UIKit/UIKit.h>

typedef void(^FilishLoadBlock)(NSData *);

@interface CustomRequest : UIViewController<NSURLConnectionDataDelegate,NSURLConnectionDelegate>

@property (retain, nonatomic) NSURLConnection *connection;

@property (retain, nonatomic) NSMutableData *dataSource;

@property (copy, nonatomic) FilishLoadBlock filishLoadBlock;

-(void)startRequstWithParm:(NSDictionary *)parm url:(NSString *)urlStr;

@end

CustomRequest.m文件

#import "CustomRequest.h"

@interface CustomRequest ()

@end

@implementation CustomRequest

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    if (self) {

        // Custom initialization

    }

    return self;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view.

}

-(void)startRequstWithParm:(NSDictionary *)parm url:(NSString *)urlStr

{

    [NSURLConnection connectionWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]] delegate:self];

}

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

{

    if (_dataSource == nil) {

        _dataSource = [[NSMutableData alloc] initWithCapacity:5];

    }

    [_dataSource appendData:data];

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection

{

    if (_dataSource) {

         self.filishLoadBlock(_dataSource);

    }

}

－－－－－－－－－－－－－－－－－封装方法－－－－－－－－－－－－－－－－－－－－－－－－－－－

#import <UIKit/UIKit.h>

typedef void(^completBlock)(NSString *);

@interface ViewController : UIViewController

- (void)startRequstWithUrl:(NSString *)url completBlock:(completBlock)block;

@end

#import "ViewController.h"

#import "CustomRequest.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

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

}

- (void)startRequstWithUrl:(NSString *)url completBlock:(completBlock)block

{

    CustomRequest *customRequest = [[CustomRequest alloc] init];

    customRequest.filishLoadBlock = ^(NSData *data)

    {

        id ret = [NSJSONSerialization  JSONObjectWithData:data options:0 error:nil];

        block(ret);

    };

    [customRequest startRequstWithParm:nil url:url];

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

－－－－－－－－－－－－－－－调用－－－－－－－－－－－－－－－－－－－－－－－－－－－－

#import "AppDelegate.h"

#import "ViewController.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {

        self.viewController = [[ViewController alloc] initWithNibName:@"ViewController_iPhone" bundle:nil];

    } else {

        self.viewController = [[ViewController alloc] initWithNibName:@"ViewController_iPad" bundle:nil];

    }

 

    self.window.rootViewController = self.viewController;

    [self.window makeKeyAndVisible];

    [self.viewController startRequstWithUrl:@"http://www.weather.com.cn/data/sk/101010300.html" completBlock:^(NSString *dd) {

        NSLog(@"dd:%@",dd);

    }];

    return YES;

}