[ios] How to add a border just on the top side of a UIView

Personally I like the sub-classing of the view + drawRect, but here's just another way of going about it (and it kind of works along the same lines as the accepted answer by @If Pollavith):

Your new border layer can be set up to have whatever dimensions you like. So, like @If Pollavith's answer, you create a layer to be as tall as you want it to be, and as wide as the view you want to have bordered. Use the layer's frame definition to place it where you want it, and then add it as a sub-layer to your view.

For reference, my own requirement was to put a border on the LEFT-HAND side of the view (please don't cut and paste this code and dis' me just 'cos it doesn't put a border at the top of the view -- modifying the code below is simple enough):

    CALayer *leftBorder = [CALayer layer];
leftBorder.borderColor = [UIColor colorWithRed:0.0 green:91.0/255.0 blue:141.0/255.0 alpha:1.0].CGColor;
leftBorder.borderWidth = 1;
leftBorder.frame = CGRectMake(0, 0, 1.0, CGRectGetHeight(self.myTargetView.frame));
[self.myTargetView.layer addSublayer:leftBorder];

I guess the only moderate benefit over this and making a small UIView or UILabel is that the CALayer is supposedly 'lighter-weight', and there's a lot of interesting views (as in opinions) about over-riding drawRect versus using CALayers (like here: iOS: Using UIView's 'drawRect:' vs. its layer's delagate 'drawLayer:inContext:').

Animal451

I like the colour blue.

Examples related to ios

Adding a UISegmentedControl to UITableView Crop image to specified size and picture location Undefined Symbols error when integrating Apptentive iOS SDK via Cocoapods Keep placeholder text in UITextField on input in IOS Accessing AppDelegate from framework? Autoresize View When SubViews are Added Warp \ bend effect on a UIView? Speech input for visually impaired users without the need to tap the screen make UITableViewCell selectable only while editing Xcode 12, building for iOS Simulator, but linking in object file built for iOS, for architecture arm64

Examples related to objective-c

Adding a UISegmentedControl to UITableView Keep placeholder text in UITextField on input in IOS Accessing AppDelegate from framework? Warp \ bend effect on a UIView? Use NSInteger as array index Detect if the device is iPhone X Linker Command failed with exit code 1 (use -v to see invocation), Xcode 8, Swift 3 ITSAppUsesNonExemptEncryption export compliance while internal testing? How to enable back/left swipe gesture in UINavigationController after setting leftBarButtonItem? Change status bar text color to light in iOS 9 with Objective-C

Examples related to xcode

Undefined Symbols error when integrating Apptentive iOS SDK via Cocoapods Xcode 12, building for iOS Simulator, but linking in object file built for iOS, for architecture arm64 iPhone is not available. Please reconnect the device Make a VStack fill the width of the screen in SwiftUI error Failed to build iOS project. We ran "xcodebuild" command but it exited with error code 65 The iOS Simulator deployment targets is set to 7.0, but the range of supported deployment target version for this platform is 8.0 to 12.1 Xcode 10.2.1 Command PhaseScriptExecution failed with a nonzero exit code Git is not working after macOS Update (xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools) Xcode 10: A valid provisioning profile for this executable was not found Xcode 10, Command CodeSign failed with a nonzero exit code

Examples related to uiview

How can I mimic the bottom sheet from the Maps app? UIView touch event in controller Swift addsubview and remove it Swift UIView background color opacity How do I change UIView Size? How to add constraints programmatically using Swift Load a UIView from nib in Swift Remove all constraints affecting a UIView How do I write a custom init for a UIView subclass in Swift? How to use UIVisualEffectView to Blur Image?

Examples related to border

How to create a inner border for a box in html? Android LinearLayout : Add border with shadow around a LinearLayout Giving a border to an HTML table row, <tr> In bootstrap how to add borders to rows without adding up? Double border with different color How to make a transparent border using CSS? How to add a border just on the top side of a UIView Remove all stylings (border, glow) from textarea How can I set a css border on one side only? Change input text border color without changing its height