小编B.S*_*mar的帖子

如何nsuserdefault在swift中自动清除值？我已经尝试了这个,但它对我不起作用......

[[NSUserDefaults standardUserDefaults] setPersistentDomain:[NSDictionary dictionary] forName:[[NSBundle mainBundle] bundleIdentifier]];

在这里,我试图制作圆角矩形角进度条,但我有一些问题来创建它,在这里我发布我的代码我尝试了什么？

任何人都想让自定义进度条到圆角矩形进度条.

self.progressView.frame=CGRectMake(55, 490, 200, 15)
self.progressView.layer.cornerRadius = 15.0
self.progressView.transform=CGAffineTransformMakeScale(1.0, 7.0)

我曾尝试将swift ViewController文件包含在Objective-C项目中,但我无法做到,它显示错误,如未知类型名称导入如何解决此问题请任何一个帮助解决此问题.

在这里,我发送我的代码和ScreenShot.

import UIKit
@objc class SigViewController2: UIViewController {

@IBOutlet weak var cameraBtn: UIButton!

@IBOutlet weak var imageBtn: UIButton!

@IBOutlet weak var settingsBtn: UIButton!

@IBOutlet weak var mediaBtn: UIButton!


override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view, typically from a nib.
}
override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(true)
    navigationController?.navigationBarHidden = false

    self.navigationItem.title = "Main";
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {

    // Only allow Portrait
    return UIInterfaceOrientationMask.Portrait
}

override func preferredInterfaceOrientationForPresentation() …

我在我的应用程序中实现了一些TextField功能所以我使用了TextField Delegates,但它显示了一些错误,如"字符串类型的值没有成员长度"我不知道如何解决这个问题,请帮助我解决这个问题.

在这里,我给出了我正在尝试的代码.

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    var oldLength: Int = textField.text!.characters.count
    var replacementLength: Int = string.characters.count
    var rangeLength: Int = range.length
    var newLength: Int = oldLength - rangeLength + replacementLength
    if textField.tag == 1 {
        if string.length > 0 && !NSScanner.scannerWithString(string).scanInt(nil) {  **------>//Error was showed in this line.**
            return false
        }
        // This 'tabs' to next field when entering digits
        if newLength == 5 {
            if textField == txtOtp4 {
                textField.resignFirstResponder() …

我会在我的应用程序中实现SearchBar概念,但它有一个错误,当我输入搜索栏中的第一个字符时它不工作而tableview没有显示相关字段,它显示空tableview但我输入第二个字符显示相关字段在tableview中,我不知道是什么错误让我请帮帮我.

我在这里给出了我的代码.

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{
       NSLog(@"searching::");
       if(searchBar.text.length == 0)
       {
            [searchDict removeAllObjects];
            [arrayDict removeAllObjects];
            searchDict=[[NSMutableArray alloc]init];
            arrayDict=[[NSMutableArray alloc]init];
            [self getJsonResponse];
            [self.tableView reloadData];    
       } else {
            [arrayDict removeAllObjects];
            arrayDict=[[NSMutableArray alloc]init];
       }
       dispatch_async(dispatch_get_main_queue(), ^{
       [self getSearchJsonResponse:searchBar.text];
       NSLog(@"searchDict::%@",searchDict);
       [self.tableView reloadData];
   });    
}

当我在swift中将Json字符串转换为字典时,我得到了问题:错误域= NSCocoaErrorDomain Code = 3840"JSON文本没有以数组或对象开头,并且选项允许未设置片段." UserInfo = {NSDebugDescription = JSON文本不以数组或对象开头,并且选项允许未设置片段.}

我不知道要解决这个问题,请给出解决问题的想法.在这里,我给了我的代码我尝试了什么..

将Json字符串转换为字典的方法是,

func convertToDictionary(from text: String) throws -> [String: String] {
    guard let data = text.data(using: .utf8) else { return [:] }
    let anyResult: Any = try JSONSerialization.jsonObject(with: data, options: [])
    return anyResult as? [String: String] ?? [:]
}

Json字符串是: "[{\"propertyId\":\"1\",\"inspectionTemplateId\":1118,\"value\":[{\"widgetControllerId\":141,\"value\":\"Flood Summary Name\"},{\"widgetControllerId\":142,\"value\":\"Did the property flood?\"},{\"widgetControllerId\":143,\"value\":\"no\"}]}]"

方法的用法是:

let jsonString = NSString(data: responseObject as! Data, encoding: String.Encoding.utf8.rawValue)!
        print(jsonString)
        do {
            let dictionary:NSDictionary = try self.convertToDictionary(from: jsonString as String) as NSDictionary …

我想在我的项目中为标签设置背景图片,但我不知道如何设置,请说是否可能？

我试图在TableView中查看MKMapView,但它已经崩溃了一些问题,但我无法找到问题,请任何人帮我清除这个问题？它显示这样......

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序,原因:'无效的区域中心:-119.27656620,+ 34.26884010 span:+0.04487346,-0.12825858>'

在这里,我给我的代码我做了什么..

let location = CLLocationCoordinate2D(
        latitude: longarray[indexPath.row] as! Double,
        longitude: latarray[indexPath.row] as! Double

    )
    print("the json array of Longitude is  \(self.longarray[indexPath.row])")
    print("the json array of Longitude is  \(self.latarray[indexPath.row])")

    let span = MKCoordinateSpanMake(2.0, 2.0)
    print("the span is  \(span)")
    let region = MKCoordinateRegion(center: location, span: span)

    cell.mapView.setRegion(region, animated: true)

    let annotation = MKPointAnnotation()
    annotation.coordinate = location

    cell.mapView.addAnnotation(annotation)

我想将BarCode Reader添加到我的项目中,但是当我尝试时我遇到了一些问题.在这里我给出了错误代码,如何解决这个请任何人帮我解决这个问题.

let dict = NSMutableDictionary()
        dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
        dict[NSLocalizedFailureReasonErrorKey] = failureReason
        dict[NSUnderlyingErrorKey] = error
        error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)  //-----> In this line i have a error.

在我的代码中,当我解析API时,我得到的错误就像__NSSingleObjectArrayI有nil,但是数组有值.

在这里,我给出了我的部分代码..

latitudeArray = [monumentArray valueForKey:@"lat"];
        NSLog(@"latitudeArray is %@",latitudeArray);
        longitudeArray = [monumentArray valueForKey:@"lng"];
        NSLog(@"longitudeArray is %@",longitudeArray);

for (int i = 0; i<3; i++) {

            CLLocation *locationA = [[CLLocation alloc] initWithLatitude:[latStr doubleValue] longitude:[longStr doubleValue]];
            CLLocation *locationB = [[CLLocation alloc] initWithLatitude:[[latitudeArray objectAtIndex:i] doubleValue] longitude:[[longitudeArray objectAtIndex:i] doubleValue]]; ----------> This Line I Got The Crash Error..

            CLLocationDistance distanceInMeters = [locationA distanceFromLocation:locationB];
            NSLog(@"distanceInMeters is %f",distanceInMeters);
            float i  = distanceInMeters/1000;
            NSLog(@"distance between two places is %f KM", i);

            //[locationDistances addObject:distanceInMeters];
        }

NSSingleObjectArrayI是什么意思？

*** Terminating app due …

在此行中,错误是显示.有人能告诉我犯了什么错误吗？

 Stripe.createTokenWithCard(card, completion: { (token: STPToken!, error: NSError!) -> Void in
        self.handleToken(token)

我必须根据文本的大小来扩展TextView的大小，但是它已经显示了问题，但是我无法修复，因此请帮助我解决此问题。

var size: CGSize = text.sizeWithFont(UIFont.boldSystemFontOfSize(13), constrainedToSize: textSize, lineBreakMode:NSLineBreakMode.ByWordWrapping)

在我的应用程序中，我实现了 FCM 推送通知。当使用 FCM 控制台和 pushtry.com 网站检查通知时，它工作正常，然后我尝试使用实际的服务器 API，前台通知运行良好，但后台通知未收到，有时它很少收到，而且没有横幅和声音。请帮助找出问题。

在这里，我附上了我正在尝试的代码。

import UIKit
import UserNotifications
import Firebase

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(_ application: UIApplication,
             didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()

Messaging.messaging().delegate = self
if #available(iOS 10.0, *) {
    UNUserNotificationCenter.current().delegate = self

    let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
    UNUserNotificationCenter.current().requestAuthorization(
        options: authOptions,
        completionHandler: {_, _ in })
} else {
    let settings: UIUserNotificationSettings =
        UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
    application.registerUserNotificationSettings(settings)
}

application.registerForRemoteNotifications()
return true …