//业务处理层.h

import <Foundation/Foundation.h>

@interface LoadData : NSObject
//分享单例对象

• (instancetype)shareLoadData;
  //获取数据

• (void)getData:(NSDictionary *)dic;
  //定义block传值
  @property (nonatomic,strong)void (^dataDic)(NSDictionary *dataDictionary);
  @end

.m文件

import "LoadData.h"

//定义静态变量
static LoadData *ld = nil;
@implementation LoadData
//分享单例对象

• (instancetype)shareLoadData
  {
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
  ld = [[LoadData alloc]init];
  });
  return ld;
  }
• (instancetype)allocWithZone:(struct _NSZone *)zone
  {
  if (!ld) {
  ld = [super allocWithZone:zone];
  }
  return ld;
  }

• (id)copy
  {
  return self;
  }

• (id)mutableCopy
  {
  return self;
  }
  //http://api.jisuapi.com/illegaladdr/coord?lat=31.3004&lng=121.484&range=1000&num=10&appkey=de394933e1a3e2db
  //获取数据

• (void)getData:(NSDictionary *)dic
  {
  //创建请求网址
  NSURL *url = [NSURL URLWithString:@"http://api.jisuapi.com/illegaladdr/coord"];
  //创建请求对象
  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
  //设置请求方式
  request.HTTPMethod = @"POST";
  //设置请求参数
  NSString *str = [NSString stringWithFormat:@"lat=%@&lng=%@&num=%@&range=%@&appkey=%@",dic[@"lat"],dic[@"lng"],dic[@"num"],dic[@"range"],dic[@"appkey"]];
  //设置请求方法体
  request.HTTPBody = [str dataUsingEncoding:NSUTF8StringEncoding];
  //获取会话对象
  NSURLSession *session = [NSURLSession sharedSession];
  //请求数据
  NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
  //解析json数据
  NSDictionary *dataDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
  NSLog(@"=============%@",dataDic);
  //block传值
  dispatch_async(dispatch_get_main_queue(), ^{
  self.dataDic(dataDic);
  });
  }];

  //开始请求
  [task resume];
  }
  @end

//#import "ViewController.m"

import "ViewController.h"

import "LoadData.h"

import "DetailViewController.h"

import <MapKit/MapKit.h>

import <CoreLocation/CoreLocation.h>

@interface ViewController ()<CLLocationManagerDelegate>
{
//定义变量地图视图、定位对象、当前位置
MKMapView *mv;
CLLocationManager *lm;
CLLocation *loc;
}
@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];
  //创建导航按钮
  UIBarButtonItem *item = [[UIBarButtonItem alloc]initWithTitle:@"附近违章高发地" style:UIBarButtonItemStylePlain target:self action:@selector(itemClicked)];
  self.navigationItem.rightBarButtonItem = item;
  //初始化地图视图
  mv = [[MKMapView alloc]initWithFrame:self.view.bounds];
  mv.mapType = MKMapTypeStandard;
  mv.zoomEnabled = YES;
  mv.rotateEnabled = YES;
  mv.scrollEnabled = YES;
  mv.showsUserLocation = YES;
  [self.view addSubview:mv];
  //初始化定位管理器
  lm = [[CLLocationManager alloc]init];
  [lm requestWhenInUseAuthorization];
  //设置代理
  lm.delegate = self;
  //设置精确度
  lm.desiredAccuracy = kCLLocationAccuracyBest;
  //色织过滤器
  lm.distanceFilter = kCLDistanceFilterNone;
  //开始定位
  [lm startUpdatingLocation];
  }

//设置导航按钮响应方法

• (void)itemClicked
  {
  //跳转
  DetailViewController *dvc = [[DetailViewController alloc]init];
  dvc.loc = loc;
  [self.navigationController pushViewController:dvc animated:YES];
  }
  //设置定位响应方法
• (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(nonnull NSArray<CLLocation *> *)locations
  {
  loc = locations.lastObject;
  //定位位置
  MKCoordinateSpan span = {0.01,0.01};
  MKCoordinateRegion region = {loc.coordinate,span};
  [mv setRegion:region animated:YES];
  //添加锚点
  MKPointAnnotation *anno = [[MKPointAnnotation alloc]init];
  anno.coordinate = loc.coordinate;
  [mv addAnnotation:anno];
  }

//跳转页面.h

import <UIKit/UIKit.h>

import <CoreLocation/CoreLocation.h>

@interface DetailViewController : UIViewController
//定义属性当前位置
@property (nonatomic,strong)CLLocation *loc;
@end

//跳转页面.m

import "DetailViewController.h"

import "LoadData.h"

@interface DetailViewController ()<UITableViewDataSource,UITableViewDelegate>
{
//定义变量数据字典、表格
NSArray *arr;
UITableView *table;
}
@end

@implementation DetailViewController

• (void)viewDidLoad {
  [super viewDidLoad];
  //设置请求参数
  NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%f",self.loc.coordinate.latitude],@"lat",[NSString stringWithFormat:@"%f",self.loc.coordinate.longitude],@"lng",@"1000",@"range",@"10",@"num",@"de394933e1a3e2db",@"appkey", nil];
  //调用业务处理类请求数据
  [[LoadData shareLoadData]getData:dic];
  //初始化表格
  table = [[UITableView alloc]initWithFrame:self.view.bounds];
  table.dataSource = self;
  table.delegate = self;
  [self.view addSubview:table];
  }

• (void)viewWillAppear:(BOOL)animated
  {

  //更新数据字典
  [LoadData shareLoadData].dataDic = ^(NSDictionary *dataDictionary) {
  arr = dataDictionary[@"result"];

    NSLog(@"-----------%@",arr);
    
    //更新表格
    [table reloadData];
  

  };
  }

//设置行数

• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
  {
  return arr.count;
  }
  //设置单元格内容
• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
  static NSString *cellid = @"cellid";
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellid];
  if (!cell) {
  cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellid];
  }
  NSDictionary *dic = arr[indexPath.row];
  cell.textLabel.text = [NSString stringWithFormat:@"%@%@%@",dic[@"province"],dic[@"city"],dic[@"address"]];
  cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",dic[@"content"]];
  return cell;
  }