小编Pav*_*nen的帖子

我removeAnnotations用来删除我的注释,mapView但同样删除用户位置ann.我该如何防止这种情况,或者如何让用户回来查看？

NSArray *annotationsOnMap = mapView.annotations;
        [mapView removeAnnotations:annotationsOnMap];

我有一个用户位置(蓝点)和注释mapView.选择注释时,我将文本设置为distLabel- "距离点%4.0f m.".用户移动时如何更新该文本标签？

didSelectAnnotationView:

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{

    CLLocation *pinLocation = 
      [[CLLocation alloc] initWithLatitude:
                        [(MyAnnotation*)[view annotation] coordinate].latitude 
                                 longitude:
                        [(MyAnnotation*)[view annotation] coordinate].longitude];
    CLLocation *userLocation = 
      [[CLLocation alloc] initWithLatitude:
                          self.mapView.userLocation.coordinate.latitude             
                                 longitude:
                                 self.mapView.userLocation.coordinate.longitude];        
    CLLocationDistance distance = [pinLocation distanceFromLocation:userLocation];

    [distLabel setText: [NSString stringWithFormat:@"Distance to point %4.0f m.",    
                                                     distance]];
}

我知道有一个功能didUpdateToLocation,但我怎么能用didSelectAnnotationView呢？

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{
  //Did update to location
}

我曾经为我inputView展示uipickerview过textfield,但我也用它来做textfield其他功能.我如何能显示标准键盘我用后inputView为textfield？

textfield.inputView = pickrView;

我使用此方法显示带小数分隔符的键盘

myTextField.keyboardType=UIKeyboardTypeDecimalPad;

如何将逗号更改为点分隔符？

我有一个芬兰语区域.使用逗号,小数不适用于我的应用程序.

-(IBAction)calculate {
    float x = ([paino.text floatValue]) / ([pituus.text floatValue]) *10000;    
    label.text = [[NSString alloc] initWithFormat:@"%0.02f", x];
}

在我的viewDidLoad我设置

UISwipeGestureRecognizer *swipeRecognizerU = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeUpDetected:)]; swipeRecognizerU.direction = UISwipeGestureRecognizerDirectionUp; [self.view addGestureRecognizer:swipeRecognizerU];

当我通过弹出窗口加载新视图时,我需要禁用该手势

// show popup view
-(IBAction)showPopup:(id)sender
{
    MJDetailViewController *detailViewController = [[MJDetailViewController alloc] initWithNibName:@"MJDetailViewController" bundle:nil];
    [self presentPopupViewController:detailViewController animationType:MJPopupViewAnimationSlideBottomBottom];
}

在弹出视图被解除后,我需要设置滑动手势.

// hide popup view
-(IBAction)hidePopup:(id)sender
{
    [self dismissPopupViewControllerWithanimationType:MJPopupViewAnimationSlideBottomBottom];
}

怎么做到这一点？

我有开关,我想检测是否有任何开关被改变位置,如果有变化我需要开始我的行动.

开关存储位置 NSUserDefaults

- (IBAction)saveSwitch:(id)sender
{     
    NSUserDefaults *defs1 = [NSUserDefaults standardUserDefaults];
    [defs1 setBool: blackSwitch.on forKey: @"blackKey"];

    NSUserDefaults *defs2 = [NSUserDefaults standardUserDefaults];
    [defs2 setBool: greenSwitch.on forKey: @"greenKey"];

    [[NSUserDefaults standardUserDefaults] synchronize];
}

现在,当我选择注释时,我将视图重新定位为居中,如下所示:

[mapView setCenterCoordinate:view.annotation.coordinate animated:YES];

但是,如何才能将视图重新定位到垂直而不是水平居中？

我的数据结构是:

现在我遍历列表并添加" Name "字符串NSMutableArray,然后使用搜索和过滤数据NSPredicate.

我如何搜索整个列表？通过所有数组中的Name和Address字符串？

过滤数据:

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope 
{
    NSPredicate *resultPredicate = [NSPredicate
                                    predicateWithFormat:@"SELF contains[cd] %@",
                                    searchText];

    searchResults = [sectionsNames filteredArrayUsingPredicate:resultPredicate];
}

加载数据中:

#pragma mark -
#pragma mark Load plist file
- (void)loadPList
{

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

      NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
        NSString *path = [[documentPaths lastObject] stringByAppendingPathComponent:@"data.plist"];
        NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];

        NSMutableDictionary *resultDic = [[NSMutableDictionary alloc] init];
        NSMutableArray *resultArray = [[NSMutableArray alloc] init]; 
        NSMutableArray *resultName = [[NSMutableArray alloc] …

我使用过滤表格结果 NSPredicate

   NSPredicate *resultPredicate = [NSPredicate
                                    predicateWithFormat:@"Name CONTAINS[cd] %@ OR Address CONTAINS[cd] %@",
                                    searchText,
                                    searchText];

    searchResults = [NSMutableArray array];

    for (key in dict) {

        if ([resultArray containsObject:key]) {

            NSArray *array = [dict objectForKey:key];
            matches = [array filteredArrayUsingPredicate:resultPredicate];

            if (matches.count > 0) {

                [searchResults addObjectsFromArray:matches];
                // sorting array
                NSSortDescriptor *sort=[NSSortDescriptor sortDescriptorWithKey:@"Distance" ascending:YES];
                [searchResults sortUsingDescriptors:[NSArray arrayWithObject:sort]];
            }

        }
    }

    }

然后我使用排序结果数组 NSSortDescriptor

NSSortDescriptor *sort=[NSSortDescriptor sortDescriptorWithKey:@"Distance" ascending:YES];
                [searchResults sortUsingDescriptors:[NSArray arrayWithObject:sort]];

它有效,但不是所有结果:

可能重复:
如何在Xcode中用+替换空格

在这个字符串中我需要替换空格:

controller.body = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@@%@,%@", pinTitle.text, newlatLabel.text, newlogLabel.text];