See the answer in English> From which direction swift starts to read dictionaries? 1 one
Hello, I tried the print dictionary project in Xcode9. Like this:
var items = [“Bear”:”0″, “Glass”:”1″
Tag: SWIFT
An error occurred while trying to save an image in NSUSERDEFAULTS
When I tried to save an image in NSUserDefaults, the application crashed due to an error.
Why? Is it possible to save images using NSUserDefaults? If not, then how to save the image?
Pi
The dome of the UIView in SWIFT
I am trying to use the following code to round the top corners
func roundCorners(corners:UIRectCorner, radius: CGFloat) {
let path = UIBezierPath(roundedRect: self.bounds,
byRoundingCorners
Array – Recourse in SWIFT
In Python, I can create a repeating list like this:
>>> [1,2,3 ]*3
[1, 2, 3, 1, 2, 3, 1, 2, 3] Is there a concise method in Swift?
The best thing I can do is:
1> var r = [Int]()
r
Swift’s use of closed bag
The simplest way to write closures, here is the format {(parameters) -> return type in
statements
}
Examples
//let append = {(str1 aa:String ,Str2 bb: String)-> String in error, the c
SWIFT: How to use PreProcessor Flags to implement API keys?
In Objective-C, static string constants are sometimes used to define alternate API keys (for example, the RELEASE and DEBUG keys to distinguish analysis packages, such as MixPanel, Flurry or Crashl
SWIFT Basic Syntax – Data Type
Common Swift data types value type enum Optional structure (Struct) Bool, Int, Float, Double, Character String, Array, Dictionary, Set reference type class class
Sw The use of ift’s
SWIFT – Change the map type (mixed, satellite) by segmentation control
I am trying to use the segment control button to change the map type, I hope it can use 3 options to change the map type: standard, satellite and hybrid. So far, I have this code but Once a differe
swift – tvOS Button Action
I created a UIButton in tvOS via Swift
let randomBtn = UIButton()
randomBtn. setTitle(“Zufällig”, forState: .Normal)
let RndNormal = UIImage(named: “RndNormal”)
let RndHoover = UIImage(named:
Array – Swift array () forced blur, no more context – but is limited to expansion
This is legal (arr is an array):
let arrenum = Array(arr.enumerated()) So why is this illegal?
extension Array {
func f() {
let arrenum = Array(self.enumerated())
// error: type of