I'm combining Swift and Objective-C in the same project. I am trying to use STTwitter cocoapod like this:
// objective-c
// STTwitter category method
//
- (void)getStatusesLookupTweetIDs:(NSArray *)tweetIDs
successBlock:(void (^)(NSArray *))successBlock
errorBlock:(void (^)(NSError *))errorBlock {
[self getStatusesLookupTweetIDs:tweetIDs
includeEntities:#(YES)
trimUser:#(YES)
map:#(YES)
successBlock:successBlock
errorBlock:errorBlock];
}
Swift Code
// swift
twitterApi.getStatusesLookupTweetIDs(ids, successBlock: { (tweets: [AnyObject]!) -> Void in
process(tweets)
finish()
}, errorBlock: { (err) -> Void in
error(err)
})
Everything looks fine in Obj-C (I tried not investigate variable passed to successBlock, they all have valid values). But in Swift, when successBlock gets executed, tweets was:
Printing description of tweets:
([AnyObject]!) tweets = 1 value {
[0] = <error: use of undeclared identifier 'cocoarr'
error: 1 errors parsing expression
>
}
How do I fix this and pass NSArray into Swift? (No compile error)
That worked for me.
Instead of using:
[AnyObject]
try to use:
[Dictionary<String, AnyObject>] (or whatever class is inside the array)
Try to specify the type of the array instead AnyObject.
I hope it helps.
Cheers.
Try [[String:AnyObject]] rather than [AnyObject]
I got the same error in a smilar functionality. When changing from:
if let dictOrList = NSJSONSerialization.JSONObjectWithData(data, options:nil, error: &err) as? NSDictionary {
callbackList = [dictOrList]
} else if let list = NSJSONSerialization.JSONObjectWithData(data, options:nil, error: &err) as? [AnyObject] {
callbackList = list
}
to
if let dictOrList = NSJSONSerialization.JSONObjectWithData(data, options:nil, error: &err) as? [String: AnyObject] {
callbackList = [dictOrList]
} else if let list = NSJSONSerialization.JSONObjectWithData(data, options:nil, error: &err) as? [[String:AnyObject]] {
callbackList = list
}
I got it working.
Related
I'm incorporating the HERE SDK into my app. Aside from one simple map setup, all the examples on the HERE website are shown in objective-C, and I'm trying my best to translate them into Swift but it's not working 100% yet. I'm trying to put a route between 2 coordinates onto a map view as per their routing example shown at:
https://developer.here.com/mobile-sdks/documentation/ios/topics/routing.html
The interesting thing is that if I just call for the map everything works, but if I add the routing part I get the following error:
NMAKit FATAL: License Key, App ID, or App Code not set. error on launch which is odd because the credentials are fine! So I think the bug is entirely in my Swift translation.
The instructions in objective-C are very clear:
1. Adopt NMARouteManagerDelegate protocol and create a NMARouteManager:
#interface ClassName : NSObject <NMARouteManagerDelegate>
{
// Setup your class
}
(void)setup
{
Create a NMARouteManager.**
NMARouteManager* routeManager = [NMARouteManager sharedRouteManager];
// Setup delegate
[routeManager setDelegate:self];
}
2. Create an NSMutableArray and add two NMAGeoCoordinates stops:
NSMutableArray* stops = [[NSMutableArray alloc] initWithCapacity:4];
NMAGeoCoordinates* geoCoord1 = [[NMAGeoCoordinates alloc]
initWithLatitude:49.1966286 longitude:-123.0053635];
NMAGeoCoordinates* geoCoord2 = [[NMAGeoCoordinates alloc]
initWithLatitude:49.1947289 longitude:-123.1762924];
[stops addObject:geoCoord1];
[stops addObject:geoCoord2];
3. Create an NMARoutingMode and set its NMATransportMode, NMARoutingType and NMARoutingOption values:
NMARoutingMode* routingMode = [[NMARoutingMode alloc]
initWithRoutingType:NMARoutingTypeFastest
transportMode:NMATransportModeCar
routingOptions:0];
4. Calculate the route:
[routeManager calculateRouteWithStops:stops routingMode:routingMode];
5. To receive the results of the route calculation, implement the NMARouteManagerDelegate protocol method
routeManager:didCalculateRoutes:withError:violatedOptions: in your delegate class.
Note: Routes are returned even if you receive the NMARouteManagerErrorViolatesOptions error. It is up to you to handle these route results that violate routing options.
-(void) routeManager: (NMARouteManager*)routeManager
didCalculateRoutes:(NSArray*)routes
withError:(NMARouteManagerError)error
violatedOptions:(NSArray*)violatedOptions
{
// If the route was calculated successfully
if (!error && routes && routes.count > 0)
{
NMARoute* route = [routes objectAtIndex:0];
// Render the route on the map
mapRoute = [NMAMapRoute mapRouteWithRoute:route];
[mapView addMapObject:mapRoute];
}
else if (error)
{
// Display a message indicating route calculation failure
}
}
And this is what I'm trying to do in Swift:
import UIKit
//I changed the NMARouteManagerDelegate to my original class here
//and couldnt allow NSObject in the class delegation because it conflicts with UIViewController
class TestViewController: UIViewController, NMARouteManagerDelegate {
var mapCircle:NMAMapCircle?
#IBOutlet weak var mapView: NMAMapView!
#IBAction func get_route_action(sender: AnyObject) {
doRouting()
}
let routeManager = NMARouteManager.sharedRouteManager()
func doRouting() {
let geoCoord1 = NMAGeoCoordinates(latitude:41.350949, longitude:-74.182097)
let geoCoord2 = NMAGeoCoordinates(latitude:41.3437502, longitude:-74.1624284)
let stops = [geoCoord1, geoCoord2]
routeManager.calculateRouteWithStops(stops)
}
func routeManager(routeManager: NMARouteManager!, didCalculateRoutes routes: [AnyObject]!, withError error: NMARouteManagerError, violatedOptions: [AnyObject]!) {
print(routes)
print(error)
print(violatedOptions)
guard error == NMARouteManagerError.None else {
print("Route calculation error: \(error)")
return
}
guard let routes = routes, route = routes[0] as? NMARoute else {
print("Route calculation error: no routes")
return
}
let mapRoute = NMAMapRoute(route: route)
// Render the route on the map
mapView.addMapObject(mapRoute)
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//mapView.useHighResolutionMap = true
var coordinates: NMAGeoCoordinates
coordinates = NMAGeoCoordinates(latitude: 41.350949, longitude: -74.182097)
mapView.zoomLevel = 13.2
mapView.setGeoCenter(coordinates, withAnimation: NMAMapAnimation.Linear)
mapView.copyrightLogoPosition = NMALayoutPosition.BottomCenter
addMapCircle()
}
func addMapCircle() {
if mapCircle == nil {
let coordinates: NMAGeoCoordinates =
NMAGeoCoordinates(latitude: 41.350949, longitude: -74.182097)
mapCircle = NMAMapCircle(geoCoordinates: coordinates, radius: 50)
mapView.addMapObject(mapCircle)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I tried your code, and worked basically for me quite fine.
But I additionally added the credentials in AppDelegate.swift:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
NMAApplicationContext.setAppId(YourAppID, appCode: YourToken, licenseKey: YourKey);
return true;
}
This is critical, since if it's missing, it's throwing exactly the error you get.
I am trying to convert this Objective-C block into Swift:
[self.client downloadEntity:#"Students" withParams: nil success:^(id response) {
// execute code
}
failure:^(NSError *error) {
// Execute code
}];
This is my code in Swift, but the syntax seems to be a bit off:
client.downloadEntity("Students", withParams: nil, success: {(students: [AnyObject]!) -> Void in
print("here")
}, failure: { (error: NSError!) -> Void! in
print ("here")
}
This is giving me a few compilation errors:
Value of 'AnyObject' has no member 'downloadEntity'
It is complaining about the lack of commas (,) right after the failure part of the code
Try this:
client.downloadEntity("Student", withParams: nil,
success: { (responseObj) -> Void in
print("success: \(responseObj)")
},
failure: { (errorObj) -> Void in
print("treat here (in this block) the error! error:\(errorObj)")
})
You need to switch to the new Swift error syntax, and you can also using trailing closures. I had to use a bool for the example to show how you would call your success closure, or you would throw an error.
var wasSuccessful = true // This is just here so this compiles and runs
// This is a custom error type. If you are using something that throws an
// NSError, you don't need this.
enum Error:ErrorType {
case DownloadFailed
}
// Hopefully you have control over this method and you can update
// the signature and body to something similar to this:
func downloadEntity(entityName: String, success: ([AnyObject]) -> Void) throws {
let students = [AnyObject]()
// download your entity
if wasSuccessful {
// Call your success completion handler
success(students)
}
else {
throw Error.DownloadFailed
}
}
When you have a function that can throw an error, you need to call it with try inside a do/catch block.
// Calling a function that can throw
do {
try downloadEntity("Students") { students in
print("Download Succeded")
}
}
catch Error.DownloadFailed {
print("Download Failed")
}
// If you are handling NSError use this block instead of the one above
// catch let error as NSError {
// print(error.description)
// }
The documentation for XCTest waitForExpectationsWithTimeout:handler:, states that
Only one -waitForExpectationsWithTimeout:handler: can be active at any given time, but multiple discrete sequences of { expectations -> wait } can be chained together.
However, I have no idea how to implement this, nor can I find any examples. I'm working on a class that first needs to find all available serial ports, pick the correct port and then connect to the device attached to that port. So, I'm working with at least two expectations, XCTestExpectation *expectationAllAvailablePorts and *expectationConnectedToDevice. How would I chain those two?
I do the following and it works.
expectation = [self expectationWithDescription:#"Testing Async Method Works!"];
[AsynClass method:parameter callbackFunction:^(BOOL callbackStatus, NSMutableArray* array) {
[expectation fulfil];
// whatever
}];
[self waitForExpectationsWithTimeout:5 handler:^(NSError *error) {
if (error) {
XCTFail(#"Expectation Failed with error: %#", error);
}
NSLog(#"expectation wait until handler finished ");
}];
// do it again
expectation = [self expectationWithDescription:#"Testing Async Method Works!"];
[CallBackClass method:parameter callbackFunction:^(BOOL callbackStatus, NSMutableArray* array) {
[expectation fulfil];
// whatever
}];
[self waitForExpectationsWithTimeout:5 handler:^(NSError *error) {
if (error) {
XCTFail(#"Expectation Failed with error: %#", error);
}
NSLog(#"expectation wait until handler finished ");
}];
swift
let expectation1 = //your definition
let expectation2 = //your definition
let result = XCTWaiter().wait(for: [expectation1, expectation2], timeout: 10, enforceOrder: true)
if result == .completed {
//all expectations completed in order
}
Assigning my expectation to a weak variable worked for me.
This seems to be working for me in Swift 3.0 as well.
let spyDelegate = SpyDelegate()
var asyncExpectation = expectation(description: "firstExpectation")
spyDelegate.asyncExpectation = asyncExpectation
let testee = MyClassToTest(delegate: spyDelegate)
testee.myFunction() //asyncExpectation.fulfill() happens here, implemented in SpyDelegate
waitForExpectations(timeout: 30.0) { (error: Error?) in
if let error = error {
XCTFail("error: \(error)")
}
}
asyncExpectation = expectation(description: "secoundExpectation")
spyDelegate.asyncExpectation = asyncExpectation
testee.delegate = spyDelegate
testee.myOtherFunction() //asyncExpectation.fulfill() happens here, implemented in SpyDelegate
waitForExpectations(timeout: 30.0) { (error: Error?) in
if let error = error {
XCTFail("error: \(error)")
}
}
Within a class that extends XCTestCase you can use wait(for:timeout:) like this:
let expectation1 = self.expectation(description: "expectation 1")
let expectation2 = self.expectation(description: "expectation 2")
let expectation3 = self.expectation(description: "expectation 3")
let expectation4 = self.expectation(description: "expectation 4")
// ...
// Do some asyc stuff, call expectation.fulfill() on each of the above expectations.
// ...
wait(for:[expectation1,expectation2,expectation3,expectation4], timeout: 8)
I know this is probably a simple queston, I would like to return the value of currentLocGeoPoint and return the array of Objects which is of type PFObject.
Tried to save it as a global variable, but it doesn't work because it is asynchronous and doesn't take a value yet. Returns empty.
Tried to return currentLocGeoPoint and changed Void in to PFGeoPoint in. Gives error: PFGeoPoint is not convertible to 'Void'
So I'm not sure how I can fetch the variable currentLocGeoPoint.
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
CLGeocoder().reverseGeocodeLocation(manager.location, completionHandler: { (placemarks, error) -> Void in
if (error != nil) {
println("Error:" + error.localizedDescription)
//return
}
if placemarks.count > 0 {
let pm = placemarks[0] as CLPlacemark
self.displayLocationInfo(pm)
currentLoc = manager.location
currentLocGeoPoint = PFGeoPoint(location:currentLoc)
var query = PFQuery(className:"Bar")
query.whereKey("BarLocation", nearGeoPoint:currentLocGeoPoint, withinMiles:10)
query.limit = 500
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]!, error: NSError!) -> Void in
if objects != nil {
} else {
println("error: \(error)")
}
}
} else {
println("error: \(error)")
}
})
}
I don't understand the notion of "I want to return currentLocGeoPoint". Return it to what? You're in a CLLocationManagerDelegate method, so there's no one to return it to.
What you could do, though, is, when the request is done (i.e. within this closure), call some other function that needed the currentLocGeoPoint. Or you could update the UI to reflect the updated information (make sure to dispatch that update to the main thread, though). Or, if you have other view controllers or model objects that need to know about the new data, you might post a notification, letting them know that there is an updated currentLocGeoPoint. But within this method, there's no one to whom you would "return" the data.
You could assign it to a stored property of your class. Just use
self.<property> = currentLocGeoPoint
I have Objective-C code that I try to convert to Swift but failed.
typedef void (^ CDVAddressBookWorkerBlock)(
ABAddressBookRef addressBook,
CDVAddressBookAccessError* error
);
#interface CDVAddressBookHelper : NSObject
{}
- (void)createAddressBook:(CDVAddressBookWorkerBlock)workerBlock;
#end
And this is Objective-C implementation:
CDVAddressBookHelper* abHelper = [[CDVAddressBookHelper alloc] init];
[abHelper createAddressBook:
^(ABAddressBookRef addrBook, CDVAddressBookAccessError* errorCode)
{
/* ...*/
}
];
How to write it in Swift?
From documentation:
{(parameters) -> (return type) in expression statements}
This is a template xCode offers:
This is what I tried:
var abHelper:CDVAddressBookHelper = CDVAddressBookHelper()
abHelper.createAddressBook(
{(addrBook:ABAddressBookRef, errCode:CDVAddressBookAccessError) in
if addrBook == nil {
}
} )
Error:
Type 'ABAddressBook!' does not conform to protocol 'AnyObject'`
[EDIT]
Regards to: swift-closure-declaration-as-like-block-declaration post I tried to write typealias:
typealias CDVAddressBookWorkerBlock = (addrBook:ABAddressBookRef, errCode:CDVAddressBookAccessError) -> ()
What next?
How to make it work?
Thanks,
Check out the docs about how to work with Cocoa and Core Foundation.
This should work:
abHelper.createAddressBook() {
(addrBook:ABAddressBook?, errCode:CDVAddressBookAccessError!) in
if addrBook == nil {
}
}