there is a error that keeps popping up on line 17. you should show all the error messages.

what should i do ? strrev is not a Standard C function and is not included in the libraries provided with Xcode. You may need to define it by yourself.

how can i define it ? You can find many articles defining strrev, but it would be better for you to do it by yourself if you are learning C-programming.

Can you show enough code for examining what's happening? Simplified full code which builds and runs would be welcome.

I cannot show the all code  I see. Hope your issue will be fixed soon. Good luck.

Why don't you simply access the property uuid? for result in results as! [HKQuantitySample] { let uuid = result.uuid print(uuid) let bloodGlucose = result.quantity.description //... } By the way, what is the type of results? You should better avoid risky forced casting as! as far as you can.

do you have any idea what should i do ? You should show your code.

here's my code :) Thanks. It's a little bit far from I imagined... It should be something like this: #include stdio.h #include string.h char *strrev(char *word) { //... - You need to implement `strrev` by yourself } int main(int argc, const char * argv[]) { char word[100]; char words[100]; printf("Input your word:"); gets(word); //- `gets` is unsafe. Better not use it. strcpy(words,word); printf("Reversed:"); printf("%s\n", strrev(words)); if( strcmp(word,words) == 0 ) { printf("It is a palindrome word\n"); } else { printf("It is not a palindrome word\n"); } return 0;, } If you want to practice C-programming with Xcode, you should better find a better textbook which is written for Standard C.

Initializer 'init(value:total:)' requires that 'BindingInt' conform to 'BinaryFloatingPoint' Thanks for showing the error message. That will help readers find what's happening in your code. The initializer of ProgressView you are trying has this signature: initV(value: V?, total: V = 1.0) where Label == EmptyView, CurrentValueLabel == EmptyView, V : BinaryFloatingPoint The value passed to value: needs to be of some type BinaryFloatingPoint, not Binding nor Int. struct ContentView: View { @State private var progress: Double = 0 //- A type conforming to `BinaryFloatingPoint` var body: some View { ProgressView(value: progress) //- No `$` here } }

You can install/upgrade to the latest version of Xcode through Mac App Store. Or you can download any version you prefer through the More Downloads page - https://developer.apple.com/download/more/.

Any thoughts? Assume you want to call this isDateInToday(_:): isDateInToday(_:) - https://developer.apple.com/documentation/foundation/calendar/2293243-isdateintoday (When you ask something about functions defined in a framework, you should better include a link to the doc of it.) In this case, isDateInToday is an instance method. When you want to call an instance method of some other type, you need to prefix instanceName: instanceName.isDateInToday(oneTimeDate) The instance needs to be of type Calendar, you can get the instance of the user's current Calendar with Calendar.current: struct OneTimeRow: View { let calendar = Calendar.current //- An instance of `Calendar` //...     var body: some View { //... if calendar.isDateInToday(oneTimeDate) { Text("Today at \(oneTimeDate, formatter: itemFormatter)") } else if calendar.isDateInYesterday(oneTimeDate) { //- `isDateInYesterday`, not `isDateinYesterday` Text("Yesterday at \(oneTimeDate, formatter: itemFormatter)") } else if calendar.isDateInTomorrow(oneTimeDate) { Text("Tomorrow at \(oneTimeDate, formatter: itemFormatter)") } else { //... } //... } }

Have you checked he Debug Workflow settings? Debug Debug Workflow Always Show Disassembly Always Show Disassembly needs to be unchecked.

What do you get with changing as (NSCopying & NSObjectProtocol)? to as NSData? ?

You can find old Xcodes on the More Downloads page - https://developer.apple.com/download/more/. (You may need to scroll down long.) The latest version of Xcode for macOS 10.13.6 is 10.1 based on the Xcode wiki - https://en.wikipedia.org/wiki/Xcode. Anyway, neither 9 nor 10,1 can build apps for App Store, are you OK with that?

Your code contains many missing parts -- Shop, AnyTransition.trailingBotton, CardView, zoopeData, ProductDetailView and sampleClothes, or possibly more. If you could show buildable, simplified, but enough to reproduce the issue, I (and many readers) would examine it. One thing to note, having Views in an @State variable would be a bad design in SwiftUI in almost all cases. Just hold a model enough to represent CardView, and construct CardView inside body using the model.