网络请求 下拉刷新 block传值

////  RootTableViewController.m//  NetJSONCountry////  Created by sunlihuo on 15/5/26.//  Copyright (c) 2015年 sunlihuo. All rights reserved.//#import "RootTableViewController.h"#import "Country.h"#import "CityTableViewController.h"#import "Common.h"@interface RootTableViewController ()@property (strong, nonatomic) NSMutableArray *countrys;@property (strong, nonatomic) CityTableViewController *cityVC;@end@implementation RootTableViewController- (instancetype)init{    self = [super init];    if (self) {        self.countrys = [NSMutableArray new];        [self onCreate];            }    return self;}-(void)onCreate{    NSURL *url = [NSURL URLWithString:kWeiboCountryURL];    NSURLRequest *request = [NSURLRequest requestWithURL:url];        [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue new] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {        if (connectionError) {            NSLog(@"error is %@", connectionError);        } else {            NSError *error = nil;            NSArray *tmpArr = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];            //NSLog(@"tmpDict is %@", tmpArr);            NSDictionary *tmpDict = nil;            Country *country = nil;            for (int i = 0; i < tmpArr.count; i++) {                tmpDict = tmpArr[i];                for (NSString *key in tmpDict.allKeys) {                    country = [Country new];                    country.countryID = key;                    country.countryName = tmpDict[key];                    [self.countrys addObject:country];                }            }            //NSLog(@"self.countrys is %@", self.countrys);                        dispatch_async(dispatch_get_main_queue(), ^{                [self.tableView reloadData];            });        }    }];    }-(void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];    UIBarButtonItem *reloadBtn = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(reload:)];    reloadBtn.title = @"刷新";    [self.navigationItem setRightBarButtonItem:reloadBtn animated:YES];    }-(void)reload:(UIBarButtonItem *)sender{    [self onCreate];    }- (void)viewDidLoad {    [super viewDidLoad];        //创建下拉刷新组件    self.refreshControl = [[UIRefreshControl alloc]init];    self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"松开刷新"];    [self.refreshControl addTarget:self action:@selector(refreshTableView) forControlEvents:UIControlEventValueChanged];        }#pragma mark 下拉刷新-(void)refreshTableView{    [self.refreshControl beginRefreshing];    [self onCreate];    [self.refreshControl endRefreshing];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark - Table view data source- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {    return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    //NSLog(@"self.countrys.count is %zi", self.countrys.count);    return self.countrys.count;        //return 10;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    NSString *cellID = @"cellID";    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];        if (!cell) {        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID];    }    //NSLog(@"cell is %@", cell);    Country *country = self.countrys[indexPath.row];    cell.textLabel.text = country.countryName;    cell.detailTextLabel.text = country.countryID;    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;    //NSLog(@"country.countryName is %@", country.countryName);    return cell;}-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    if (!self.cityVC) {        self.cityVC = [CityTableViewController new];    }    self.cityVC.title = [NSString stringWithFormat:@"%@城市列表",self.countrys[indexPath.row]];    self.cityVC.country = self.countrys[indexPath.row];        [self.cityVC initWithBlock:^(Country *country) {        NSString *msg = [NSString stringWithFormat:@"您选择了%@", country];                UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:msg delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];        [alert show];    }];        [self.navigationController pushViewController:self.cityVC animated:YES];    }/*// Override to support conditional editing of the table view.- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the specified item to be editable.    return YES;}*//*// Override to support editing the table view.- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {    if (editingStyle == UITableViewCellEditingStyleDelete) {        // Delete the row from the data source        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];    } else if (editingStyle == UITableViewCellEditingStyleInsert) {        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view    }   }*//*// Override to support rearranging the table view.- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {}*//*// Override to support conditional rearranging of the table view.- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the item to be re-orderable.    return YES;}*//*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end

////  CityTableViewController.h//  NetJSONCountry////  Created by sunlihuo on 15/5/26.//  Copyright (c) 2015年 sunlihuo. All rights reserved.//#import <UIKit/UIKit.h>#import "Country.h"#import "Country.h"typedef void(^MyBlock)(Country *country);@interface CityTableViewController : UITableViewController@property (strong, nonatomic) Country *country;@property (strong, nonatomic) MyBlock myBlock;-(void)initWithBlock:(MyBlock)block;@end

////  CityTableViewController.m//  NetJSONCountry////  Created by sunlihuo on 15/5/26.//  Copyright (c) 2015年 sunlihuo. All rights reserved.//#import "CityTableViewController.h"#import "RootTableViewController.h"@interface CityTableViewController ()@property (strong, nonatomic) NSMutableArray *citys;@end@implementation CityTableViewController- (instancetype)init{    self = [super init];    if (self) {            }    return self;}- (void)viewDidLoad {    [super viewDidLoad];    }- (void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];    [self onCreate];    }-(void)onCreate{    self.citys = [NSMutableArray new];    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://api.weibo.com/2/common/get_province.json?access_token=2.00ZtlF5C0GvJSM28ba1329cb6CdARD&country=%@",self.country.countryID]];    NSLog(@"%@", self.country.countryID);    NSURLRequest *request = [NSURLRequest requestWithURL:url];        [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue new] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {        if (connectionError) {            NSLog(@"error is %@", connectionError);        } else {            NSError *error = nil;            NSArray *tmpArr = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];            NSLog(@"tmpDict count is %zi", tmpArr.count);            NSDictionary *tmpDict = nil;            Country *country = nil;            for (int i = 0; i < tmpArr.count; i++) {                tmpDict = tmpArr[i];                for (NSString *key in tmpDict.allKeys) {                    country = [Country new];                    country.countryID = key;                    country.countryName = tmpDict[key];                    [self.citys addObject:country];                }            }            NSLog(@"self.citys is %@", self.citys);                        dispatch_async(dispatch_get_main_queue(), ^{                [self.tableView reloadData];            });        }    }];        }- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark - Table view data source- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {    return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return self.citys.count;}-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    NSLog(@"**************************");    NSString *cellID = @"cityCellID";    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];        if (!cell) {        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID];    }    //NSLog(@"cell is %@", cell);    Country *country = self.citys[indexPath.row];    cell.textLabel.text = country.countryName;    cell.detailTextLabel.text = country.countryID;    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;    NSLog(@"country.countryName is %@", country.countryName);    return cell;}-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        [self.navigationController popViewControllerAnimated:YES];    self.myBlock(self.citys[indexPath.row]);}-(void)initWithBlock:(MyBlock)block{    self.myBlock = block;}/*// Override to support conditional editing of the table view.- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the specified item to be editable.    return YES;}*//*// Override to support editing the table view.- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {    if (editingStyle == UITableViewCellEditingStyleDelete) {        // Delete the row from the data source        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];    } else if (editingStyle == UITableViewCellEditingStyleInsert) {        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view    }   }*//*// Override to support rearranging the table view.- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {}*//*// Override to support conditional rearranging of the table view.- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the item to be re-orderable.    return YES;}*//*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end