Recent questions tagged Swift

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swift - Upgrading Firebase broke my iOS project

I wish I had never updated my pod, the entire project was full of errors, one specific error is in the photo ... }) }) uploadTask.resume() } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Use of undeclared type 'AttributedString'

Xcode 8 beta 4 no longer recognizes Foundation class AttributedString. I've reproduced it in this simple ... code error in Playground? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - iOS-Charts Float to Integer YAxis

I'm building a chart using iOS-charts I'm trying to convert the floats into int, but iOS-charts only allows ... making sure only ints are used? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Why does the following code crash on an iPhone 5 but not an iPhone 5S?

func rand(max: Int?) -> Int { var index = Int(arc4random()) return max? != nil ? (index % max!) : index } ... % UInt32(max!)) : Int(index) } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - iOS 10 custom navigation bar height

I implemented custom navigation bar height, by subclassing it with following code class TMNavigationBar: UINavigationBar { /// ... bar in IB). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - UIPickerView selectRow doesn't works

I try to select a row in my PickerView but it doesn't works. It stays at the first row. Here is my code: ... row but it stays on the first one. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - List all subclasses of one class

Can I return a list of all subclasses of one class? For example: class Mother { } class ChildFoo: Mother ... [ChildFoo.self, ChildBar.self] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to convert array of dictionary to JSON?

I have an array of dictionaries that I'd like to convert to JSON. My object is of type [[String: AnyObject]] and ... } } How can I do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - IOS 8 iPad App Crashes When UIActivityViewController Is Called

When a UIActivityViewController is called on the iPhone in this app, it works perfectly, but when called on a iPad, ... do to fix this problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to increase (animate) the width of the square on both ends?

I have created a square that is 40x40, as shown above. I have a 4x40 strip that I'd like to use to ... also increase as the sprite increases. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - What are the functional differences between Coredata's CodeGen 'manual/none + create NSManagedObject subclass' vs. 'category/extension'

I've read Subclassing NSManagedObject with swift 3 and Xcode 8 beta and read this great tutorial. Still have questions on ... - without ? or !? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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swift - Add constraints to generic parameters in extension

I have this function: func flatten<Key: Hashable, Value>(dict: Dictionary<Key, Optional<Value>>) -> Dictionary ... protocol type 'Optional<Any>' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Why do integers not conform to the AnyObject protocol?

Why can I have an [AnyObject] array and put a bunch of different sized types in it ... var a = [AnyObject] ... ? Why is this designed like this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - MFMailComposeViewController behaves differently in iOS 13 simulator and device

I'm trying to display MFMailComposeViewController in an app. if MFMailComposeViewController.canSendMail() { let ... } Demo project See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Difference between NSRange and NSMakeRange

Is there any difference between: NSRange(location: 0, length: 5) and: NSMakeRange(0, 5) Because Swiftlint throws a ... Thanks for the Help :-) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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swift - NSImage Getting Resized when I draw Text on it

I have the following code to draw a text over an NSImage. But the resulting image is getting resized to smaller ... im.unlockFocus() return im } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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926 views

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swift - Generic Types Collection

Building on previous question which got resolved, but it led to another problem. If protocol/class types are stored in ... .speak() } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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swift - Instance member cannot be used on type Class?

I'm trying to access the name variable from Indicator class, which inherits from Person. However, I believe I'm not ... print("(name)") } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - No such Module Error

I am working on a chat app using Swift, and cocoa pods and I keep getting this issue. It says no such ... ) default: break } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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swift - Using AppleScript with Apple Events in macOS - Script not working

We need to use a AppleScript to create an outgoing email message in macOS. The script works fine in the Script ... "runScript",self.script) } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

swift - Trap SIGINT in Cocoa macos application

I am attempting to trap a SIGINT for a UI application made for MacOS. In the app delegate class, I ... can close the resources appropriately? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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swift - Load data from json using UIPickerView

My Current View Controller is like this import UIKit import Alamofire class ViewController: UIViewController , ... Please help!!! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

swift - How to set UIButton font via appearance proxy in iOS 8?

I tried to set the font of UIButton via appearance proxy. But it doesn't seem to work. This is what ... conforms to the UIAppearance protocol." See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Rounded corners for UITabBar

I would like to create a UITabBar with rounded corners. Is there a way I can make the UITabBar ... () return newImage! } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.9k views

1 answer

swift - Programmatically disabling screenshot in App

I want to prevent taking screenshot of a page in app. how to do it programmatically so that screenshots ... // executes after screenshot } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

swift - Firebase Firestore: Append/Remove items from document array

I am trying to append/remove items from an array inside of a Firestore Document but every time the entire ... currently possible in Firestore? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

swift - How to render a whole UITableView as an UIImage in iOS?

I have simple UITableView with some data. The table's height is greater than the screen size. Now I need to catch ... to capture this. isn't it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

1 answer

swift - iOS app doesn't ask for location permission

My Swift-iOS app is meant to show the user's location on a map. However, the XCode debug console tells me I ... as indicated here doesn't help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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