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I have the following object:
(rates)
{
EUR: "1"
RON: 4.5
USD: 1.3
.
.
.
n: INT/STRING
}
Is there any function that does this?
if you care about the index, you can use a 'traditional' for loop - although #Eric points out this will soon be completely removed
for var i = 0; i < rates.count; i++
{
let rate = rates[i]
// do stuff with rate
}
The enumerate approach looks like this
for (index, rate) in rates.enumerate()
{
print("Do stuff with \(rate) at position \(index)")
}
if you just need each object in turn it's a bit easier
for rate in rates
{
// do stuff with rate
}
Because it's a dictionary, no enumerate() required:
var aDictionary: [String: Float] = ["EUR": 1, "RON": 4.5,
"USD": 1.3]
for (index,item) in aDictionary{
print(index,item)
}
Related
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The following code allows to create a font with different weights.
func makeFont(weight: CGFloat, size: CGFloat) -> UIFont {
var attributesDict = [String: Any]()
attributesDict["Weight"] = weight
/* Rubik-Light - is a variable font */
let fontDescriptor = UIFontDescriptor(
fontAttributes: [
UIFontDescriptor.AttributeName.name : "Rubik-Light",
kCTFontVariationAttribute as UIFontDescriptor.AttributeName : attributesDict
]
)
return UIFont(descriptor: fontDescriptor, size: size)
}
It works fine on ios 13 and below, but doesn't work on iOS 14. Is there any solution?
Solved.
iOS 14 expects attribute ID instead of its name ("Weight").
So, attributeDict should look like this:
var attributesDict = [NSNumber: Any]()
attributesDict[NSNumber(value: 2003265652)] = weight
Attribute ID can be obtained as follows:
let variationAxes = (CTFontCopyVariationAxes(ctFont)! as Array)
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I need to check preconditions for proceeding a function in iOS/Swift.
Option 1:
guard let name = str["name"], let age = str["age"] else {
print("name/age missing")
return
}
Option 2:
guard let name = str["name"] else {
print("name missing")
return
}
guard let age = str["age"] else {
print("age missing")
return
}
Which option is recommended.
This is completely unrelated to Swift.
From a UI / UX perspective certainly the 2nd option since you can now point to the exact input field that is missing.
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I want to convert this Swift code to Objective C. I searched and did not find a way to convert automatically . Is there any way that can help convert ?
let token="0000000009"
SkyIdConfig.shared.setup(With: token)
var skyIdView:SkyDocumentsAnalyzer?
SkyIdConfig.shared.loadAndConfigure(){[unowned self] isConfigured,error in
if error != nil || !isConfigured {
print(error?.localizedDescription ?? "Error !!!!")
return
}
DispatchQueue.main.async {[unowned self] in
self.skyIdView=SkyIdBuilder.shared.getDocumentAnalyzerInstance(with: "03", lang: "fra")
if self.skyIdView != nil
{
self.skyIdView!.delegate=self
self.skyIdView?.modalPresentationStyle = .fullScreen
self.present(self.skyIdView!, animated: true, completion: nil)
}else{
print("Error in config loading")
}
}
}
Of course there is a way to convert ..
..manually. Which is the best way to understand whats going on.
your token is probably an
NSString *token = #"0000000009";
depending on the Class definition you have to look up how SkyIdConfig is done..
//assuming its something like..
[[SkyIdConfig shared] setupWith:token];
SkyDocumentsAnalyzer *skyIdView = [[SkyDocumentsAnalyzer alloc] init];
[[SkyIdConfig shared] loadAndConfigure];
before going forward in code read more about dispatching in objective-c (aka c) here...
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How can I check if the string is base64 encoded in swift?
Input = "tNC6umcfBS/gelbo2VJF3i4LAhUKMp4oDHWN5KyYUTWeJIQKKYx6oAcQnGncIrPJNC1tUYMKV4kJQj3q9voIOrxc1n7FmRFvDXeRgWGNcGYO66dH3VjoEgF0oxZOpfzwSZKSv3Jm7Q=="
let base64Regex = "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$"
let predicate = NSPredicate(format: "SELF MATCHES %#", base64Regex)
let result = predicate.evaluate(with: "InputString")
You can also try to decode using the built-in Data:
let inputString = "..."
let isBase64Encoded = Data(base64Encoded: inputString) != nil
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In swift ,I need to show “10月02日”**but not **"10月2日",how to transfer "2"to "02"?
Now ， i have wrote these codes,but it will show "2",but not "02":
var publishLastDate:NSDate = momentLast.created_on
println(publishLastDate)
componentsLast = NSCalendar.currentCalendar().components(NSCalendarUnit.CalendarUnitDay | NSCalendarUnit.CalendarUnitMonth | NSCalendarUnit.CalendarUnitYear, fromDate: publishLastDate)
lastDay = componentsLast.day
lastMonth = componentsLast.month
lastYear = componentsLast.year
It looks like you're grabbing the components and printing the string yourself. You can format it like so:
let string = String(format: "%02d月%02d日", lastMonth, lastDay)