swift4 tag

34 questions

1 answers
93 views
0

Swift4 Xcode 10.1beta3 NSFetchedResultsController does not recognize UITableView in the middle of the layout

I want to manage TableView data sources in the middle of the layout in the UIViewController with the FetchedResultsController, but it does not recognize TableView (see error message below).2018-10-25 ...

ios swift4 coredata

1 years ago

2 answers
66 views
0

Swift4systemUptime method

Thank you very much for letting me know how to get the time that Swift4 has started.When I actually wrote the code, it turned out to be negative or a ridiculous number.Question 1. Does the systemUptim...

swift swift4

1 years ago

1 answers
82 views
0

About retrieving data from the API using URLSessionTask on Swift4.

[What I want to do] I want to store data from the GetDataFromAPI class getDataFromAPI function in the ViewController class variable data.つまStumbling points brI don't know how to return the variables i...

swift ios swift4

1 years ago

2 answers
82 views
0

I want to implement the UI slider and adjust the volume.

Extensions based on the contents of the current textbook (adjust the volume of the UI slider sound source)is about to be implemented.The problem I want to solve is that I can adjust the volume after p...

swift4

1 years ago

1 answers
95 views
0

I want to set the data from Firebase to the properties in the class.

class ViewController:UIViewController { //..... var friendId—String! userID=098752 letPath=ref.child(user/\(userID)/friend/userId) Path.observeSingleEvent(of:.value, with:{(snapshot)in self.friendI...

swift4 firebase

1 years ago

3 answers
99 views
0

Examples of SWIFT classes and structures that behave differently when changing properties

I'm studying swift, but I don't know much about classes and structures.When function a calls function b, if the instance of the class is passed to function b as an argument, changing the value of the ...

swift swift4

1 years ago

2 answers
94 views
0

The process of switching an image tapped in the IF statement of SWIFT to another image.

I want to switch to PAUSE image when I tap START image as attached image, but I can't.追Additional The build passes through the xcode, but when I tap the START image, it does not switch to the PAUSE im...

swift xcode swift4 optional

1 years ago

1 answers
99 views
0

When I built the application that was using CoreData on Swift3 with Swift4, Check dependencies came out.

When I built the application that used CoreData in swift3 with swift4, the following check dependencies came outThe use of Swift3 @objc reference in Swift4 mode is decremented. Please address decremen...

swift3 swift4 coredata

1 years ago

1 answers
65 views
0

What is the standard for UIViewController transitions?

What is the standard for the transition between UIViewControllers in swift4xcode10?When I looked into it, I found that many of them connected segue from the xcode storyboard GUI... and that it was dif...

swift xcode swift4

1 years ago

1 answers
105 views
0

RealmSwift wants to get a list of "many" of one-to-many relationships

I'm a beginner practicing database operations at realm.Implementation of tag functionality, database designI was able to run the database using this answer.Therefore, I would like to display a list of...

ios xcode swift4 realm

1 years ago

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