Swift refresh uilabel

Swift Tool Belt, Part 3: Extending UILabel

Then we change the Label's text in Swift. So: With the approach here, we can use Swift code to change the values of controls in an iPhone program. Many things are possible. Name product. A dialog will appear prompting your for the name of your product. I suggest "ExampleTime" but you can choose another name. Open Main. This is automatically generated by Xcode for your program. A storyboard file contains interface controls like Labels or Buttons. Tip: We must add controls to Main. Continue with the next steps. Show object library. In the bottom right part of Xcode you will see an "Object Library" button. This is an important button. It is shaped like a circle. Then: Click the object library button. Now scroll down through the controls we can add. Stop when you see "Label. Click: Next click the Assistant editor icon which has weird circles on it. This splits the screen—ideal for dragging things. Important: Your window should now have the iPhone interface with the label on the left and the ViewController. Note: Blue lines will appear. Drop: Release the drag and a box will appear. Type the name of your Label—I prefer the name "simpleLabel. Quote: Outlets provide a way to reference interface objects—the objects you added to your storyboard—from source code files.

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These extensions will allow easy access to modify the edge insets on a label the extra padding all around the text. The first extension is pretty simple. It adds a rotation transform to a UILabel. The setter for the rotation converts the degrees into radians and then constructs a transform to rotate the label. The getter is not necessary here, so I just return zero. You could extend this extension to do more than just rotation. Any ability you have with CGAffineTransformsuch as translation or scale, can be done in a similar way. However, you will not see your rotation changes take effect until we change the class of our UILabel to DesignableLabel. See my first post in this series to get an explanation of DesignableLabel. At this point, you should be able to see the label rotated in the storyboard. You may notice clipping on your label text after it is rotated. Unfortunately, Interface Builder does not do a great job of rendering the rotated label, but this will not be the case at runtime. The label will not be clipped when you run your project. This is what the rotated label looks like running on the simulator. You cannot set edge insets on a label easily. In order to accomplish it, you have to draw the text manually. The class override will take care of the drawing, and the extension provides easy access to the edge insets in Interface Builder. I did not come up with this solution. Thanks go to Nikolai Ruhe answering this Stack Overflow question. As I mentioned in my first post in this seriesputting the attribute on an extension can be hit and miss. Change the class name of your label to EdgeInsetLabel. After you change the class for your label, you will see the new attributes that we added in the extension show up in the Attributes inspector. I like this solution and use it on almost every project. Thanks again to Nikolai Ruhe. I hope you find it useful as well. By commenting below, you agree to the terms and conditions outlined in our linked Privacy Policy. C Update. Atomic Object.

Swift Tool Belt, Part 3: Extending UILabel


As we all know about the refresh control story, for the first time i think twitter started with the new animation when a scroll view scrolled down that is pulled down and after release in order to load new content an animation is added this is pull to refreshfinally apple added the same concept of pull to refresh to UIKit and that is UIRefreshControl. Hmm, what we have to do for if we want to use refresh control for collection view, we can use refresh control for collectionview. But what to do if we want to add the refresh control to bottom of the collection view.? We are using the activity indicator view to display the loading animation, and we are performing the some animation to display the activity indicator while dragging the collection view to top and after release we are calling the a method to load the items to collectionview. Now add the new swift file to project, name it as CustomFooterView. Next before adding code to ViewController. In the above code, we are just adding the label to display some text inside the collection view cell. And we are computing the pull ration to perform the custom animation, before animation the activity indicator view. CustomCollectionViewCell cell. CustomFooterView self.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am attempting to learn Apple's Swift. I was recently trying to build a GUI app, but I have a question:. How do I interact with GUI elements of my app? Now, how do I, while in my view controller, edit the text of this UILabel? To state it another way, what code can I use to programatically control the text of something on my storyboard? All methods I have found online only appear to work with a button generated in code, not a button generated on a storyboard. If this is right, how do I link it with the label in question? If you've successfully linked the control with an IBOutlet on your UIViewController class, then the property is added to it and you would simply replace simpleLabel with whatever you named your IBOutlet connection to be like so:. The outlet you created must've been named by you. The outlet belongs to your view controller. Since different outlets have different names, using self. Try replacing 'simpleLabel' with the name you gave to the outlet when you created it. If you're having problems with this, perhaps you're not assigning the text property in the right place. If it's in a function that doesn't get called, that line won't execute, and the text property won't change. Try overriding the viewDidLoad function, and put the line in there, like this:. Then, as soon as the view loads, you'll set the text property. If you're not sure if a line of code is executing or not, you can always put a breakpoint there, or add some output. Something like. How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. Asked 5 years, 8 months ago. Active 2 years, 4 months ago. Viewed 60k times. I've seen code like self.

Swift, Label not refreshing while in callback function

When you are ready to localize your App, Xcode will auto-generate a Main. However, if you add Elements after […]. When aligning a UITextView with other labels on the screen, the inset becomes an issue. UIColors require you to enter red, green and blue as values between 0 and 1. In pracitcal terms that means you need to divide your values by to obtain the CGFloat required. Easy enough? Still it is a tad annoying, especially as the rest of the world will give you RGB values between […]. TableViews can have a useful feature to refresh the data inside of them, simply pull to refresh. Today this feature is absolutely ambiguous and very easy to implement. For example, […]. I have no apps in the app store, but a while ago I wrote an app for my own edutainment, which needed to parse JSON Data. SwiftJSON is pretty cool as it abstracts away a lot […]. However if you have a function, which makes […]. I needed to convert a Unix Timestamp, which for some inexplicit reason was being returned as a String by an API I was using and this is the super foolish function I ended up with. For an app that I was writing I needed an easy function to scale an image to a specific width, the function below will accomplish this:. I can guarantee you that I did not come up with that function, but I can no longer recall, where I got it from. Most likely place is […]. Read More. September 21, in Swift cwolf Comments are closed Swift 4: scale image to width For an app that I was writing I needed an easy function to scale an image to a specific width, the function below will accomplish this:.

Swift 4 UILabel - Уроки Swift - Xcode 10 Label



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