Can you explain precisely what you want to do and where ? Is it in Interface Builder or in code ? where do you want to add a frame ? what is the relation between frame and constraints ?

I probably miss something. Why do you need to shrink the ScrollView ? If the content is smaller than scrollView, there will be no scroll. Do you just want to hide scroll indicators ? Or hide the frame of the scrollView ?

I can't make the button a weak var What do you mean ? You cannot control-drag the button from Storyboard in the code to create the IBOutlet ? If so, you have to check that the ViewController in the storyboard has the same class as the class into which you try to create the IBOutlet. So check in Interface Builder (storyboard): select the viewController in which is the button open the Identity Inspector in the right panel check the class of the ViewController is it the same class as the one in code where you try to create the IBOutlet ? If no, change the class in Identy inspector. Another possible reason is that you control-drag the button from IB to the wrong place in the file. It must be inside the class. Another way to try is to write in code: 		@IBOutlet weak var theButton			 : UIButton!		 Then open the storyboard in a second pane, next to the code (swift file) drag from the white dot on the left of the IBOutlet declaration top the corresponding button in IB. If that works, don't forget to close the thread by marking the answer as correct. If not, please explain better your problem.

So, pointsReceived is inside a struct. You probably have declare a var as: var grade : Grade And you have initialised with some value You need to call:  let total = grade.pointsReceived.reduce(0, +) If that works, don't forget to close the thread by marking correct answer. If not, please explain and show more code.

I bought a Mac M1. I'm developing an app using Firebase, but I can't build it with the simulator. I found out that I had a similar problem with the M1 chip, but can anyone solve it? Error statement ld: in/--Filepath--/Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector(FIRAnalyticsConnector_a8eeba373b74508311b8b22b8d3202a6.o), building for iOS Simulator, but linking in object file built for iOS, file '/--Filepath--/Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector' for architecture arm64 Firebaseに直接問い合わせる必要があります。たぶん彼らのポッドを更新する必要があります。 彼らのフォーラムにアクセスして、そこに解決策があるかどうかを確認してください。 You should ask to Firebase directly. Maybe their pod has to be updated. Go to their forum to see if there are solutions there.

In this case, would you need to retain the instance of Foo after switch is completed ? You would also need to declare switch let or switch var. I'm not convinced of the added value.

That is normal, number is a String, not a number. Do the conversion like here (nil coalescing needed in case the String is not of a number): let number = Float("-12") ?? 0 // Convert to Float, or Int("-12") if appropriate let absolute = abs(number) print(absolute) you get0 Don't forget to close the thread if that's OK.

What would be the purpose ? Which hidden files do you mean ? Are they files of the project or any hidden files in MacOS ?

Did you check the address in memory of all the var ? Are they positioned in sequence as you guess ?

A bit hard to understand: you want large font: this will take some place in button but you don't want to enlarge the button… So there may not be room for the complete title and you're surprised by the ellipses… Did you consider a multi line button (line break: word wrap or char wrap) ?

Did you solve your issue (you did not reply to the last answer nor closed the thread). That is not a very good practice on this forum. Or maybe your question was not important at all for you ?

Why do you think it should be MeetingHeader and not MeetingHeaderView ?

I would try the following: declare several apps in AppStore define for each exclusive geographical area assign the right build to each. If you explain properly to the review team what you have done, that regions are disjoint, there should not be a problem (should not be considered Spam).

Try to change accuracy. I read there were recent improvement to QRCode, to read smaller images. In any case, you should file a bug report.

Do you mean you stop the program on simulator ? That's not a normal stop of the app, so its logical to get an error exit. Which version of Xcode ? And why is it a problem to have such an exit ?