IOS处女做－－天气预报

内容：

先贴几张效果图吧

 

1、使用坐标反编译出地址

开始定位

    [self.locationManger startUpdatingLocation];   

定位服务管理初始化

    self.locationManger = [[CLLocationManager alloc] init];
    self.locationManger.delegate = self;
    self.locationManger.desiredAccuracy = kCLLocationAccuracyBest;//据说比较耗电额
    self.locationManger.distanceFilter = 1000.0f;//1000m

定位失败

    - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    NSLog(@"%@",error);
    [self showAlert];    //弹出警告框！
    }

定位成功

    - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    CLLocation *currLocation = [locations lastObject];
      [self reverseGeocode:currLocation];   //地址反编译！
    }

地址反编译

- (void)reverseGeocode:(CLLocation *) currLocation{
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder reverseGeocodeLocation:currLocation completionHandler:^(NSArray *placemarks,NSError *error){
        if ([placemarks count]>0) {
            CLPlacemark *placemark = placemarks[0];
            NSDictionary *addressDictionary = placemark.addressDictionary;
            NSString *city = [addressDictionary objectForKey:(NSString *)kABPersonAddressCityKey];
            //为了方便我分别提取了“市”，“省”之前的字
            NSString *state = [addressDictionary objectForKey:(NSString *)kABPersonAddressStateKey];
            NSRange range = [state rangeOfString:@"省"];
            state = [state substringToIndex:range.location];
            _nowProvince = state;
            self.labelProvince.text = _nowProvince;
            range = [city rangeOfString:@"市"];
            city = [city substringToIndex:range.location];
            _nowCity = city;
            self.labelCity.text = _nowCity;
        }
    }];
}

2、我使用的一些控件
在这个app中我用到了imageview，button，label等

总结一下tableview的使用

一开始准备使用自定义的单元格，最后想想没有必要就没写

设置表行数

    -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
     return [self.listData count];
    }

设置单元格

    -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
     static NSString * CellIdentifier = @"CellIdentifier";
     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
     NSInteger row = [indexPath row];
     cell.textLabel.text = [[self.listData objectAtIndex:row]objectForKey:@"city"];
     return cell;
    }

注意：将cell的Accessory设置为Discolure XXX

选择表示图行时触发

    -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
      if ([segue.identifier isEqualToString:@"SendData"]) {
        ViewController *receive = segue.destinationViewController;
        NSInteger selectedIndex = [[self.tableView indexPathForSelectedRow]row];
        NSString *selectedName = [[self.listData objectAtIndex:selectedIndex]objectForKey:@"city"];
        receive.nowProvince = self.province;
        receive.nowCity = selectedName;
      }
    }

3、在两个ViewController之间传值

使用model的方法

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"ForeInfo"]) {
        DetailViewController *receive;
        receive = segue.destinationViewController;  
        receive.listData = [self.listData objectForKey:@"forecast"];
    }
}

4、在屏幕适配的方面，我主要使用pin

5、文件的读取

我将省份，城市存在文件中（网上下的，要的话可以在下面回复额）

    NSBundle *bundle = [NSBundle mainBundle];
    NSString *path = [bundle pathForResource:@"ProvincesAndCities" ofType:@"plist"];
    self.arrayData = [[NSArray alloc] initWithContentsOfFile:path];

6、使用的API

 http://apis.baidu.com/apistore/weatherservice/citylist

具体使用的代码度娘有（灰常的方便）！！

把城市名转化为UTF8

NSURL *url = [NSURL URLWithString:[_nowCity stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
        httpArg = [[NSString alloc] initWithFormat:@"cityname=%@",url];</strong>

总结：

由于第一次制作app存在着许多的不足，比如：数据的持久化这一方面，使用segue传值虽然方便但也有一些缺陷，随着水平的上升我也会去把这个软件做的完善 。在做app的同时我感觉对objective－C的掌握以及对ios平台也有了一定的理解，和光观看书相比，实践提升更快更有效！！

最后还是感觉Google挺好用哒