objective-c,swift,objective-c-blocks , Blocks in Swift shows error “Missing argument for parameter #2 in call” [closed]
Blocks in Swift shows error “Missing argument for parameter #2 in call” [closed]
Question:
Tag: objective-c,swift,objective-c-blocks
I'm now using Jonas Gessner's JGActionSheet with Swift in my project, and the sample was written by Objective-C, when I tried to convert the block to Swift, Xcode shows the error "Missing argument for parameter #2 in call", here is the code I written and the screenshot:
Objective-C Sample
JGActionSheet *sheet = [JGActionSheet actionSheetWithSections:sections];
[sheet setButtonPressedBlock:^(JGActionSheet *sheet, NSIndexPath *indexPath)
{
[sheet dismissAnimated:YES];
}];
Code I written in Swift
let actionSheet = JGActionSheet(sections: sections)
actionSheet.buttonPressedBlock {
(sheet: JGActionSheet!, indexPath: NSIndexPath!) in
actionSheet.dismissAnimated(true)
}
Error screenshot
Missing argument for parameter #2 in call
So please help me to figure this out and thanks very much!
Answer:
actionSheet.buttonPressedBlock
is a property. You are trying to set it. So where's your equals sign? This is how you set things in Swift:
myThing.myProperty = myValue
The fact that you are trying to set this property to a block (a function) changes nothing. So:
let actionSheet = JGActionSheet(sections: sections)
actionSheet.buttonPressedBlock = {
(sheet: JGActionSheet!, indexPath: NSIndexPath!) in
actionSheet.dismissAnimated(true)
}
Related:
swift,methods,currying
There are two merge methods in RACSignal: - (RACSignal *)merge:(RACSignal *)signal; + (RACSignal *)merge:(id<NSFastEnumeration>)signals; When I write RACSignal.merge it references static method: class func merge(signals: NSFastEnumeration!) -> RACSignal! How to reference object method? I can't write self.merge, because it is in wrapper class and self is not RACSignal....
swift,try-catch-finally
I try to use the error handling modeling in Swift2. do { try NSFileManager.defaultManager().removeItemAtPath("path") } catch { // ... } finally { // compiler error. } But it seems that there is no finally keyword out there.How can I achieve try-catch-finally pattern in Swift.Any help is welcome....
ios,swift,cocoa-touch
I'm trying to get "Done" button on to load an action, preferably the action that I have for my button. Here's the UITextField declaration let someTextField = UITextField() Trying to add a target to the textField someTextField.addTarget(self, action: "loginActionButton", forControlEvents: .EditingDidEndOnExit) ...
ios,objective-c,uitableview
I'm using insertion into my UITableView with this : Skill * newSkill = [[Skill alloc] init]; newSkill.name = @"Nouvelle compétence"; newSkill.pathPicto = @"generic"; [self.skills insertObject:newSkill atIndex:0]; NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; [self.tableView beginUpdates]; [self.tableView insertRowsAtIndexPaths:@[indexPath]withRowAnimation:UITableViewRowAnimationTop]; [self.tableView endUpdates]; It works great but now I want that the inserted cell be...
ios,swift
I am trying to implement a class that will present a MFMessageComposeViewController from the AppDelegate. The class declaration looks like this: import UIKit import MessageUI class MyClass: NSObject, MFMessageComposeViewControllerDelegate { func sendAMessage() { // message view controller let messageVC = MFMessageComposeViewController() messageVC.body = "Oh hai!" messageVC.recipients = ["8675309"] // set...
swift,singleton
Trying to get a Singleton class going in Swift. I'm not getting any errors, but its also just plain not working properly. Here's the code: // The Singleton class: class DataWarehouse { class var sharedData:DataWarehouse { struct Static { static var onceToken : dispatch_once_t = 0 static var instance :...
ios,objective-c,swift,nsstring,nsmutablestring
What is the difference between stringByAppendingString and appendString? If NSString is not mutable then how could it append string?
ios,xcode,swift,uigesturerecognizer
I've got a button called and I gave it a UIGestureRecognizer so that an IBAction is only run when the button is long pressed. You do this by adding a UILongPressGestureRecognizer to the button iteself. Then you control drag that gesture recognizer to a function like this: @IBAction func handleGesture(sender:...
ios,string,swift,unicode,character
Reading the documentation and this answer, I see that I can initialize a Unicode character in either of the following ways: let narrowNonBreakingSpace: Character = "\u{202f}" let narrowNonBreakingSpace = "\u{202f}" As I understand, the second one would actually be a String. And unlike Java, both of them use double quotes...
ios,swift,uitableview
When I expand a UITableViewCell on touch, I know I have to update the UITableView. Right now I'm doing: tableView.beginUpdates() tableView.reloadRowsAtIndexPaths(indexPaths, withRowAnimation: UITableViewRowAnimation.Automatic) tableView.endUpdates() Do I need to use both updates methods as well as the reload method? Or is it just one or the other? I'm not completely understanding,...
ios,objective-c,swift
I have this instance method in an existing Obj-C UIImage category: - (UIImage *)applyDarkEffect; I'm trying to call it from a Swift file like so: self.backgroundImageView.image = UIImage.applyDarkEffect(image) But get this compiler error: Function produces expected type 'UIImage!'; did you mean to call it with '()'? ...
objective-c,cocoa,nstextfield,autoresize,nscursor
I have an NSTextField that autoresizes. Its text is centered. When I start typing in the field and then resize the enclosing NSWindow, the cursor stays where it's at rather than repositioning to the appropriate place : I've also made an XCode project demonstrating this problem : https://www.dropbox.com/sh/cohhmslyl9ti43b/AAC6ULteopsQCMDsEArJU15Ta?dl=0 Does anyone...
swift,range
Is is not possible to create a range and call its contains method like this: 1...12.contains(1) When I create a var range = 1...12 and print its dynamicType I get a Swift.Range<Swift.Int>, so I'm guessing is not a type mismatch problem, or is it?...
swift,for-loop,uiimage
i want to change this variable become looping in swift: var image1 = UIImage(named: "image1") var image2 = UIImage(named: "image2") var image3 = UIImage(named: "image3") var image4 = UIImage(named: "image4") var image5 = UIImage(named: "image5") var image6 = UIImage(named: "image6") var image7 = UIImage(named: "image7") images.append(image1!) images.append(image2!) images.append(image3!) images.append(image4!) images.append(image5!)...
ios,objective-c,ipod-touch
The iPod Touch (5th gen) has both a front and rear camera so why does my app crash when i try to present a UIImagePickerController with sourceType: UIImagePickerControllerSourceTypeCamera - (void)openImagePickerType:(NSString *)type { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; if([type isEqualToString:kImagePickerCameraString]) imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; if([type isEqualToString:kImagePickerLibraryString]) imagePicker.sourceType =...
swift,date,applescript
I'm trying to add 8Hours to a date (from the clipboard) set date1 to the clipboard set newdate to date1 + (8 * hours) display dialog "Purchases were downloaded at " & newdate buttons {"OK"} default button 1 But this is not working as expected, I'm having the error Can’t...
ios,iphone,swift,audio,ios-simulator
In my iOS Swift application, and i am trying to play sound on click of a button. func playSound() { var audioPlayer = AVAudioPlayer() let soundURL = NSBundle.mainBundle().URLForResource("doorbell", withExtension: "mp3") audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil) audioPlayer.play() } I am running the application in iOS iPhone Simulator. I have doorbell.mp3...
ios,swift
I just started learning Swift with Stanford tutorial. I have Xcode 6.3.2. I'm getting a bug at a switch operation and can't understand how to solve it. I attached a screenshot as well @IBAction func operate(sender: UIButton) { let operation = sender.currentTitle! if userIsInTheMiddleOfTypingANumber{ enter() } switch operation{ case "➕":...
ios,objective-c,uipopovercontroller
I'm trying to dismiss a popover when selecting a cell inside of it. I have created a custom delegate to support this however it is not working: In my class that houses the PopOver and table View I have the following: In .h: @protocol DismissDelegate <NSObject> -(void)didTap; @end @interface AssistanceNeededAtPopOverViewController...
ios,objective-c,swift,uitextfield,uilabel
In my application i have one UILabel and UITextField. Initially UILabel text in nil. As soon as user enter some text in UITextField my UILabel text also Update. Let say When user enter A in UITextField my UILabel immediately show A, B in UITextField my UILabel show B and so...
ios,swift,ios8,uiimagepickercontroller,ios8.3
- Actually am using UIImagePickerController for my usecase,and if i long press any picture ,it shows Copy/Hide option (as shown in the sample image) - I dont want the Copy/Hide feature. Guide me with some suggestions if u too have encountered :)... Thanks in advance...iOS Geeks...PLZ refer my code snippet...
ios,objective-c,xcode,swift,localization
I localized Info.plist : And I got this build error : error: could not read data from '/Users/cherif/Apps/Wesh/Info.plist': The file “Info.plist” couldn’t be opened because there is no such file. Actually there are now two Info.plist files : fr.lproj/Info.plist Base.lproj/Info.plist How to localize the Info.plist path ?...
swift
I'm working through one of the examples at the very handy and colourfully named site here, specifically : func applyMutliplication(value: Int, multFunction: Int -> Int) -> Int { return multFunction(value) } applyMutliplication(2, {value in value * 3 }) Notice that the closure given when calling applyMultiplication() does not specify a...
ios,swift,uitableview,cocoa-touch,ios-charts
I am working on a project where I have a table view which contains a number of cells with pretty complex content. It will be between usually not more than two, but in exceptions up to - lets say - 30 of them. Each of these complex cells contain a...
ios,swift,applovin
I would like some help with integrating interstitial ads from Applovin using Swift. Currently, I have managed to successfully integrate the SDK and initialize it using ALSdk.initializeSdk(). I have a folder in my project directory called Applovin which contains: headers folder (with all the .h files inside) and libApplovinSdk.a. I...
ios,xcode,swift,uitableview,tableviewcell
I have a table view like this: when the user tap one row, I want uncheck the last row and check the selected row. So I wrote my code like this: (for example my lastselected = 0) func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { var lastIndexPath:NSIndexPath = NSIndexPath(forRow: lastSelected, inSection:...
objective-c,xcode,osx
I'm trying to access in ~/Library/Preferences/ but my code doesn't work. NSString *resPath = @"~/Library/Preferences/"; NSError *error = nil; NSArray *filenames = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:resPath error:&error]; if (!error) { for (NSString * filename in filenames) { NSLog(@"%@", filename); } } Maybe I should ask for some permission.. Any idea?...
ios,swift,autolayout
I have a UINavigationController that has my custom ViewController with a tableView in it that takes up the whole screen. I want to push down the tableView and reveal a settings menu with just a couple items. My SettingsView.xib I created in a separate nib that is 320 x 90...
xcode,swift
I want to change the timer every millisecond but it doesnt work as expected. NSTimer.scheduledTimerWithTimeInterval(0.001, target: self, selector: Selector("advanceTimer:"), userInfo: nil, repeats: true); func advanceTimer(timer: NSTimer){ self.time += 0.001; let milliseconds = self.time * 100; let remaingMilliseconds = Int((milliseconds % 1000) / 10); let seconds = Int((milliseconds / 1000) %...
ios,swift,plist
i am trying to read from propriety list using swift but im getting this error, and thats the code im using to read from my plist : Arrays i'm using : var recipeNames :[String] = [] var recipeImages :[String] = [] var recipeTime :[String] = [] In viewDidload : var...
ios,objective-c,swift,video
I want to add background view with video (or gif) like in app "Uber" I'd like to use video background view for a long time in my app. And I want to know the answers to these questions: What of them will consume less battery energy Can I use it...
ios,objective-c,swift
I have SearchController for my TableViewController. I wanted to perform some actions when user taps on the empty space on the screen (between the keyboard and search bar) to dismisses the keyboard and displays the main Table View.
ios,objective-c,asynchronous,uiviewcontroller,nsobject
In my app I init a new object, where there is method which calls NSURLConnection's sendAsynchronousRequest method. After the request, I would like to call a method in the caller UIViewController. I tried to use a static method but I then I can't control IBOutlets. How can I do this?...
ios,iphone,swift
I think the question is pretty straightforward. I need only the date to appear, and not the time. Couldn't find anything for Swift, so my code is here: cell.date.text = NSDateFormatter.localizedStringFromDate(dates[indexPath.row], dateStyle: .ShortStyle, timeStyle: .ShortStyle) ...
swift,uitextfield,uicollectionviewcell
hi i have text field in uicollectionviewcell so what i need it example : when i edit text filed value in row 5 and i done it and go to text filed in row 20 to edit value the collectionview has reloaded and forget value in row 5, so i...
ios,swift,uitableview,uiviewcontroller
In order to customize a table view and add some additional controls to it, I've embedded a UTTableViewController into a Container View and placed that container View into a UIViewController. I've followed the instructions I found here: Embedding TableView in TableViewController into another view TableView is configured with four static...
ios,swift
I am trying to get a time difference based on a GMT time. where at the end of everyday the timer resets to zero. I've tried the below code on the Xcode simulator and every time i change the time on the mac, the difference also changes. how can i...
ios,objective-c
I have this methods for draw a table ant populated . What i want is to change the color for one word from each column , but i dont know how can i do it . Can somebeday help me ,please ? Any help will be appreciate . in my...
ios,objective-c,automatic-ref-counting
I came across to strange behaviour. I used to have: @property (nonatomic) ApplicationState applicationState; directly in my Application class. Now it's extracted to protocol @protocol ApplicationProtocol <NSObject> @property (nonatomic) ApplicationState applicationState; ApplicationState is Enum typedef NS_ENUM(NSUInteger, ApplicationState) { ApplicationStateNormal = 0, ApplicationStateExpanded = 1, ApplicationStateMaximized = 2 }; Now. It...
ios,objective-c,nsdateformatter
now it works with this code: NSString *myDate = @"06/18/2015 8:26:17 AM"; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"MM/dd/yyyy hh:mm:ss a"]; [dateFormatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US"]]; NSDate *date = [dateFormatter dateFromString:myDate]; [dateFormatter setDateFormat:@"dd.MM. HH:mm"]; NSString *dateString = [dateFormatter stringFromDate:date]; cell.timeLabel.text = dateString; ...
swift,parse.com,geopoints
I have tried everything. No matter what my Geopoints will not save when using an actual device with xcode or using the simulator. if signUpError == nil { PFGeoPoint.geoPointForCurrentLocationInBackground { (geoPoint: PFGeoPoint?, error: NSError?) -> Void in if error == nil { PFUser.currentUser()!.setValue(geoPoint, forKey: "location") } } I am not...
swift,generics
I'm trying to write a class which handles objects of a homogenous type, and I'd like to feed in those objects using an (otherwise arbitrary) Generator of the same type. In essence this: class MyGenericClass<T> { var source : GeneratorType var itemsProcessed = [ T ]() init(source: GeneratorType) { self.source...
swift,checkbox,uicollectionviewcell
some time ago someone already asked this question and a few answers were given but i didn't really understand any of them. So i was wondering if anyone could please write an easy to understand tutorial on how to do the things shown on the image below: http://i.imgur.com/BzIBOkH.jpg?1 I would...
ios,objective-c,uitabbarcontroller
I'm using a standard UITabBarController with icons at the bottom, each bringing to it's ownViewController. My question is basically: Is there a way to override what happens when an icon is selected rather then directly bringing them to the view? Reason being is because I'm adding a login screen to...