Using variable as lower bound for arc4random - explicit type/strideable?
'+' is unavailable: Please use explicit type conversions or Strideable methods for mixed-type arithmetics.
Example:
let a: UInt32 = 4
let b = 3
let result = a + b //error
Basically means you can't add mixed-types.
In your case when you do arc4random_uniform(UInt32(maxReps)) + minReps, arc4random_uniform() returns a UInt32 which cannot be added to minReps because that's an Int.
Solution:
Update your parenthesis:
let numberOfExercises = Int(arc4random_uniform(UInt32(maxReps))) + minReps
Here Int(arc4random_uniform(UInt32(maxReps))) gives an Int that we can add to the minReps Int.
BTW, the following works out-of-the-box:
let numberOfExercises = Int(arc4random_uniform(4) + 3)
Because of Swift's automatic type inference. Basically it just went ahead with UInt32 without bothering you. That is... until you give it explicit mixed types.
The ++ and -- operators have been deprecated Xcode 7.3
A full explanation here from Chris Lattner, Swift's creator. I'll summarize the points:
- It's another function you have to learn while learning Swift
- Not much shorter than
x += 1 - Swift is not C. Shouldn't carry them over just to please C programmers
- Its main use is in C-style for loop:
for i = 0; i < n; i++ { ... }, which Swift has better alternatives, likefor i in 0..<n { ... }(C-style for loop is going out as well) - Can be tricky to read and maintain, for eg, what's the value of
x - ++xorfoo(++x, x++)? - Chris Lattner doesn't like it.
For those interested (and to avoid link rot), Lattner's reasons in his own words are:
These operators increase the burden to learn Swift as a first programming language - or any other case where you don't already know these operators from a different language.
Their expressive advantage is minimal - x++ is not much shorter than x += 1.
Swift already deviates from C in that the =, += and other assignment-like operations returns Void (for a number of reasons). These operators are inconsistent with that model.
Swift has powerful features that eliminate many of the common reasons you'd use ++i in a C-style for loop in other languages, so these are relatively infrequently used in well-written Swift code. These features include the for-in loop, ranges, enumerate, map, etc.
Code that actually uses the result value of these operators is often confusing and subtle to a reader/maintainer of code. They encourage "overly tricky" code which may be cute, but difficult to understand.
While Swift has well defined order of evaluation, any code that depended on it (like foo(++a, a++)) would be undesirable even if it was well-defined.
These operators are applicable to relatively few types: integer and floating point scalars, and iterator-like concepts. They do not apply to complex numbers, matrices, etc.
Finally, these fail the metric of "if we didn't already have these, would we add them to Swift 3?"
UIStatusBarStyle not working in Swift
You have two options.
If you want to continue manually setting the style of the status bar, continue doing what you're doing, but you'll need to add the following key to your info.plist file with a value of NO.
View controller-based status bar appearance
Or, if you want to continue to use view controller based status bar appearance, instead of setting the application's statusBarStyle, override the preferredStatusBarStyle property in each view controller for which you'd like to specify a status bar style.
Swift 3
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
Swift 2
override func preferredStatusBarStyle() -> UIStatusBarStyle {
return UIStatusBarStyle.LightContent
}
How to determine the current iPhone/device model?
I made this "pure Swift" extension on UIDevice.
If you are looking for a more elegant solution you can use my µ-framework DeviceKit published on GitHub (also available via CocoaPods, Carthage and Swift Package Manager).
Here's the code:
import UIKit
public extension UIDevice {
static let modelName: String = {
var systemInfo = utsname()
uname(&systemInfo)
let machineMirror = Mirror(reflecting: systemInfo.machine)
let identifier = machineMirror.children.reduce("") { identifier, element in
guard let value = element.value as? Int8, value != 0 else { return identifier }
return identifier + String(UnicodeScalar(UInt8(value)))
}
func mapToDevice(identifier: String) -> String { // swiftlint:disable:this cyclomatic_complexity
#if os(iOS)
switch identifier {
case "iPod5,1": return "iPod touch (5th generation)"
case "iPod7,1": return "iPod touch (6th generation)"
case "iPod9,1": return "iPod touch (7th generation)"
case "iPhone3,1", "iPhone3,2", "iPhone3,3": return "iPhone 4"
case "iPhone4,1": return "iPhone 4s"
case "iPhone5,1", "iPhone5,2": return "iPhone 5"
case "iPhone5,3", "iPhone5,4": return "iPhone 5c"
case "iPhone6,1", "iPhone6,2": return "iPhone 5s"
case "iPhone7,2": return "iPhone 6"
case "iPhone7,1": return "iPhone 6 Plus"
case "iPhone8,1": return "iPhone 6s"
case "iPhone8,2": return "iPhone 6s Plus"
case "iPhone9,1", "iPhone9,3": return "iPhone 7"
case "iPhone9,2", "iPhone9,4": return "iPhone 7 Plus"
case "iPhone10,1", "iPhone10,4": return "iPhone 8"
case "iPhone10,2", "iPhone10,5": return "iPhone 8 Plus"
case "iPhone10,3", "iPhone10,6": return "iPhone X"
case "iPhone11,2": return "iPhone XS"
case "iPhone11,4", "iPhone11,6": return "iPhone XS Max"
case "iPhone11,8": return "iPhone XR"
case "iPhone12,1": return "iPhone 11"
case "iPhone12,3": return "iPhone 11 Pro"
case "iPhone12,5": return "iPhone 11 Pro Max"
case "iPhone13,1": return "iPhone 12 mini"
case "iPhone13,2": return "iPhone 12"
case "iPhone13,3": return "iPhone 12 Pro"
case "iPhone13,4": return "iPhone 12 Pro Max"
case "iPhone14,4": return "iPhone 13 mini"
case "iPhone14,5": return "iPhone 13"
case "iPhone14,2": return "iPhone 13 Pro"
case "iPhone14,3": return "iPhone 13 Pro Max"
case "iPhone14,7": return "iPhone 14"
case "iPhone14,8": return "iPhone 14 Plus"
case "iPhone15,2": return "iPhone 14 Pro"
case "iPhone15,3": return "iPhone 14 Pro Max"
case "iPhone8,4": return "iPhone SE"
case "iPhone12,8": return "iPhone SE (2nd generation)"
case "iPhone14,6": return "iPhone SE (3rd generation)"
case "iPad2,1", "iPad2,2", "iPad2,3", "iPad2,4": return "iPad 2"
case "iPad3,1", "iPad3,2", "iPad3,3": return "iPad (3rd generation)"
case "iPad3,4", "iPad3,5", "iPad3,6": return "iPad (4th generation)"
case "iPad6,11", "iPad6,12": return "iPad (5th generation)"
case "iPad7,5", "iPad7,6": return "iPad (6th generation)"
case "iPad7,11", "iPad7,12": return "iPad (7th generation)"
case "iPad11,6", "iPad11,7": return "iPad (8th generation)"
case "iPad12,1", "iPad12,2": return "iPad (9th generation)"
case "iPad13,18", "iPad13,19": return "iPad (10th generation)"
case "iPad4,1", "iPad4,2", "iPad4,3": return "iPad Air"
case "iPad5,3", "iPad5,4": return "iPad Air 2"
case "iPad11,3", "iPad11,4": return "iPad Air (3rd generation)"
case "iPad13,1", "iPad13,2": return "iPad Air (4th generation)"
case "iPad13,16", "iPad13,17": return "iPad Air (5th generation)"
case "iPad2,5", "iPad2,6", "iPad2,7": return "iPad mini"
case "iPad4,4", "iPad4,5", "iPad4,6": return "iPad mini 2"
case "iPad4,7", "iPad4,8", "iPad4,9": return "iPad mini 3"
case "iPad5,1", "iPad5,2": return "iPad mini 4"
case "iPad11,1", "iPad11,2": return "iPad mini (5th generation)"
case "iPad14,1", "iPad14,2": return "iPad mini (6th generation)"
case "iPad6,3", "iPad6,4": return "iPad Pro (9.7-inch)"
case "iPad7,3", "iPad7,4": return "iPad Pro (10.5-inch)"
case "iPad8,1", "iPad8,2", "iPad8,3", "iPad8,4": return "iPad Pro (11-inch) (1st generation)"
case "iPad8,9", "iPad8,10": return "iPad Pro (11-inch) (2nd generation)"
case "iPad13,4", "iPad13,5", "iPad13,6", "iPad13,7": return "iPad Pro (11-inch) (3rd generation)"
case "iPad14,3", "iPad14,4": return "iPad Pro (11-inch) (4th generation)"
case "iPad6,7", "iPad6,8": return "iPad Pro (12.9-inch) (1st generation)"
case "iPad7,1", "iPad7,2": return "iPad Pro (12.9-inch) (2nd generation)"
case "iPad8,5", "iPad8,6", "iPad8,7", "iPad8,8": return "iPad Pro (12.9-inch) (3rd generation)"
case "iPad8,11", "iPad8,12": return "iPad Pro (12.9-inch) (4th generation)"
case "iPad13,8", "iPad13,9", "iPad13,10", "iPad13,11":return "iPad Pro (12.9-inch) (5th generation)"
case "iPad14,5", "iPad14,6": return "iPad Pro (12.9-inch) (6th generation)"
case "AppleTV5,3": return "Apple TV"
case "AppleTV6,2": return "Apple TV 4K"
case "AudioAccessory1,1": return "HomePod"
case "AudioAccessory5,1": return "HomePod mini"
case "i386", "x86_64", "arm64": return "Simulator \(mapToDevice(identifier: ProcessInfo().environment["SIMULATOR_MODEL_IDENTIFIER"] ?? "iOS"))"
default: return identifier
}
#elseif os(tvOS)
switch identifier {
case "AppleTV5,3": return "Apple TV 4"
case "AppleTV6,2": return "Apple TV 4K"
case "i386", "x86_64": return "Simulator \(mapToDevice(identifier: ProcessInfo().environment["SIMULATOR_MODEL_IDENTIFIER"] ?? "tvOS"))"
default: return identifier
}
#endif
}
return mapToDevice(identifier: identifier)
}()
}
You call it like this:
let modelName = UIDevice.modelName
For real devices it returns e.g. "iPad Pro (12.9-inch) (5th generation)", for simulators it returns e.g. "Simulator iPad Pro (12.9-inch) (5th generation)"
Here's the model references:
- https://theiphonewiki.com/wiki/Models
- https://theiphonewiki.com/wiki/BORD
Related Topics
Bridgetoobjectivec Not Available on Swift Beta 5
Swift - How to Deal with Uncaught Exception
Wkwebview Won't Load (Nsviewcontroller, Os X)
Get Png Representation of Nsimage in Swift
Cmlogitem Timestamp: Why So Complicated
Count Number of Instances of a Class Swift
How to Cast Sockaddr_In to Sockaddr in Swift
Sknode Subclass Generates Error: Cannot Invoke Initializer for Type "X" with No Arguments
How to Get The Count of a Type Conforming to 'sequence'
Is There a Method to Check The UIcollectionview Item Drag Cancellation If The Item Wasn't Moved
Xcode Failed to Resolve Dependency Firebase - Googleappmeasurement Does Not Match Requirement
How to Get .Adjustsfontsizetofitwidth to Function Properly
Why Does Cabasicanimation Try to Initialize Another Instance of My Custom Calayer
Avaudioconverter with Avaudioconverterinputblock Stutters Audio After Processing
Why How to Make Same-Type Requirement in Swift with Generics? Is There Any Way