Gradient with colors that have alpha channel works fine.

@implementation MOStringDocument - (instancetype)init { self = [super init]; if (self) { // Initialize default values if needed self.data = @""; // Default to an empty string } return self; } - (BOOL)loadFromContents:(id)contents ofType:(NSString *)typeName error:(NSError *__autoreleasing *)outError { // Ensure contents is of NSData type if (![contents isKindOfClass:[NSData class]]) { if (outError) { *outError = [NSError errorWithDomain:@"com.cinnamonmobile.StocksLive" code:1001 userInfo:@{NSLocalizedDescriptionKey: @"Invalid contents type. Expected NSData."}]; } NSLog(@"[MOStringDocument] Invalid contents: %@", contents); return NO; } NSData *data = (NSData *)contents; // Check if the data is empty if (data.length == 0) { self.data = @""; // Set an empty string NSLog(@"[MOStringDocument] Loaded empty content."); return YES; } @try { // Attempt to decode the data NSString *decodedString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; if (!decodedString) { if (outError) { *outError = [NSError errorWithDomain:@"com.cinnamonmobile.StocksLive" code:1002 userInfo:@{NSLocalizedDescriptionKey: @"Failed to decode NSData as UTF-8 string."}]; } NSLog(@"[MOStringDocument] Failed to decode content as UTF-8 string."); return NO; } // Set the decoded string self.data = decodedString; NSLog(@"[MOStringDocument] Successfully loaded content: %@", self.data); } @catch (NSException *exception) { if (outError) { *outError = [NSError errorWithDomain:@"com.cinnamonmobile.StocksLive" code:1004 userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Exception occurred: %@", exception.reason]}]; } NSLog(@"[MOStringDocument] Exception occurred: %@", exception.reason); } return YES; } - (id)contentsForType:(NSString *)typeName error:(NSError *__autoreleasing *)outError { // Ensure self.data is valid if (!self.data) { self.data = @""; // Default to an empty string } // Convert the string to NSData NSData *data = [self.data dataUsingEncoding:NSUTF8StringEncoding]; if (!data) { if (outError) { *outError = [NSError errorWithDomain:@"com.cinnamonmobile.StocksLive" code:1003 userInfo:@{NSLocalizedDescriptionKey: @"Failed to encode string as NSData."}]; } NSLog(@"[MOStringDocument] Failed to encode string as NSData."); return nil; } NSLog(@"[MOStringDocument] Successfully prepared content for saving."); return data; } @end

@interface CustomView : UIView @property (nonatomic, strong) NSArray<NSNumber *> *colorsArray; // The color components array // Custom initializer that accepts an NSArray of color components - (instancetype)initWithFrame:(CGRect)frame colors:(NSArray<NSNumber *> *)colorsArray; @end @implementation CustomView // Custom initializer - (instancetype)initWithFrame:(CGRect)frame colors:(NSArray<NSNumber *> *)colorsArray { self = [super initWithFrame:frame]; if (self) { _colorsArray = colorsArray; // Store the colors array } return self; } - (void)drawRect:(CGRect)rect { // Get the current context CGContextRef context = UIGraphicsGetCurrentContext(); // Convert NSArray to a C-style array of CGFloats size_t count = self.colorsArray.count; CGFloat colors[count]; for (size_t i = 0; i < count; i++) { colors[i] = [self.colorsArray[i] floatValue]; } // Create a color space CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); // Create the gradient with the passed colors CGGradientRef gradient = CGGradientCreateWithColorComponents(colorSpace, colors, NULL, count / 4); // Define the start and end points of the gradient CGPoint startPoint = CGPointMake(rect.origin.x, rect.origin.y); CGPoint endPoint = CGPointMake(rect.origin.x, rect.origin.y + rect.size.height); // Draw the rectangle with the gradient CGContextSaveGState(context); CGContextAddRect(context, rect); CGContextClip(context); CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0); CGContextRestoreGState(context); // Release resources CGGradientRelease(gradient); CGColorSpaceRelease(colorSpace); } @end @interface ViewController : UIViewController @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Get the screen bounds CGRect screenBounds = [UIScreen mainScreen].bounds; // Define the size of each custom view CGFloat customViewWidth = screenBounds.size.width * 0.75; CGFloat customViewHeight = screenBounds.size.height * 0.75; // Define a dynamic set of colors for the first custom view (red to blue) NSArray<NSNumber *> *colorsArray1 = @[ @1.0, @0.0, @0.0, @1.0, // Red @0.0, @0.0, @1.0, @1.0 // Blue ]; // TODO: This is the bug, there is no transparency NSNumber *alpha = @0.0;// this is the ***** bug **** // Define a dynamic set of colors for the second custom view (green to yellow) NSArray<NSNumber *> *colorsArray2 = @[ @0.0, @1.0, @0.0, alpha, // Green @1.0, @1.0, @0.0, @1.0 // Yellow ]; // Calculate the position for the first view (centered horizontally and vertically, with slight offset) CGRect frame1 = CGRectMake((screenBounds.size.width - customViewWidth) / 2 - customViewWidth * 0.25, (screenBounds.size.height - customViewHeight) / 2 - customViewHeight * 0.25, customViewWidth, customViewHeight); CustomView *customView1 = [[CustomView alloc] initWithFrame:frame1 colors:colorsArray1]; // Calculate the position for the second view (slightly shifted from the first view to partially overlap) CGRect frame2 = CGRectMake((screenBounds.size.width - customViewWidth) / 2 + customViewWidth * 0.25, (screenBounds.size.height - customViewHeight) / 2 + customViewHeight * 0.25, customViewWidth, customViewHeight); CustomView *customView2 = [[CustomView alloc] initWithFrame:frame2 colors:colorsArray2]; // Set autoresizing so they adjust with the screen size customView1.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; customView2.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; // Add the custom views to the view controller's view [self.view addSubview:customView1]; [self.view addSubview:customView2]; } @end

Still happening inXcode 13.3. Maybe in XCode 100.5 will be fixed!

Stocks live app suffers from the same issue. I don’t understand why Apple doesn’t do anything about this. This is really messed up. Also, iOS 15.1 didn’t fix the issue.