小编Osc*_*car的帖子

我正在开发我的第一个iPad快速应用程序.到目前为止,我有一个基本的mapview,底部工具栏中有一个按钮,我想刷新一次,并在点击后聚焦到用户位置.

目前我有这个代码:

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

var location: CLLocation!
let locationManager = CLLocationManager()

@IBOutlet weak var mapView: MKMapView!
@IBOutlet weak var refresh: UIBarButtonItem!

@IBAction func refresh(sender: AnyObject) {

    let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)

    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

    self.mapView.setRegion(region, animated: true)
}

override func viewDidLoad() {
    super.viewDidLoad()

    self.locationManager.delegate = self

    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest

    self.locationManager.requestWhenInUseAuthorization()

    self.locationManager.startUpdatingLocation()

    self.mapView.showsUserLocation = true

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // …

我有一个显示可选表情符号的集合视图。目前可以向我显示表情符号，这很好，但是有明显的灰色背景，这在图像文件本身中并不明显。

是否可以使这些表情符号图像的背景透明而不是灰色？

这是我的代码：

import UIKit

class EmojiPopup: UIView,UICollectionViewDataSource,UICollectionViewDelegate
{
    var collocationView : UICollectionView!
    var arrImagesList:NSMutableArray!
    override init(frame: CGRect)
    {
        super.init(frame: frame)
        arrImagesList = NSMutableArray()
        self.backgroundColor = UIColor.purpleColor().colorWithAlphaComponent(0.1)
        let layout = UICollectionViewFlowLayout()
        //header gap
        layout.headerReferenceSize = CGSizeMake(30,30)
        //collection view item size
        layout.itemSize = CGSizeMake(75, 75)
        layout.minimumInteritemSpacing = 20
        layout.minimumLineSpacing = 10
        collocationView = UICollectionView(frame: CGRectMake(50,50,UIScreen.mainScreen().bounds.screenWidth - 100,UIScreen.mainScreen().bounds.screenHeight - 100), collectionViewLayout: layout)
        self.addSubview(collocationView)

        collocationView.backgroundColor = UIColor.purpleColor().colorWithAlphaComponent(0.001)
        collocationView.dataSource = self
        collocationView.delegate = self
        collocationView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "cellIdentifier")

        let fm = NSFileManager.defaultManager()
        let path = …

我正在尝试使用分段控制按钮更改地图类型,我希望它可以使用3个选项更改地图类型:标准,卫星和混合.到目前为止,我有这个代码但是一旦选择了不同的地图类型就没有任何反应:

@IBAction func segmentedControlAction(sender: UISegmentedControl!) {

    if sender.selectedSegmentIndex == 0{

        mapView.mapType = MKMapType.Standard
    }
    else if sender.selectedSegmentIndex == 1{

        mapView.mapType = MKMapType.Satellite
    }
    else if sender.selectedSegmentIndex == 3{

        mapView.mapType = MKMapType.Hybrid
    }
}

我是Swift和Xcode的新手所以感谢任何帮助:)

谢谢

我正在设计餐馆网站的表格,允许用户预订晚餐预订,每个字段都经过验证(除了复选框),如果用户在所有字段中输入了正确的信息,他们会被发送到感谢页面显示他们的预订细节.

我的代码中存在与我网站上的复选框有关的问题,如果用户点击提交而未填写必填字段,则会在屏幕顶部显示以下错误:

"Notice: Undefined index: vege in /home/users/2014/xxx/public_html/xxx/index.php on line 17

Notice: Undefined index: vegan in /home/users/2014/xxx/public_html/xxx/index.php on line 20

Notice: Undefined index: peanut in /home/users/2014/xxx/public_html/xxx/index.php on line 23

Notice: Undefined index: gluten in /home/users/2014/xxx/public_html/xxx/index.php on line 26"

这是我的预订页面的代码:

<?php
session_start();

if ( isset($_POST['vege'])) 
    $_SESSION['vege'] = $_POST['vege'];

if ( isset($_POST['vegan'])) 
    $_SESSION['vegan'] = $_POST['vegan'];

if ( isset($_POST['peanut'])) 
    $_SESSION['peanut'] = $_POST['peanut'];   

if ( isset($_POST['gluten'])) 
    $_SESSION['gluten'] = $_POST['gluten'];

?>

...

<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">

...

<strong>Dietary Requirements:</strong>
<br><br>
Vegetarian <input type="checkbox" name="vege" …