macos - 如何在mac应用程序中的NSImage中创建水印

我在 NSImage 工作，我想在 NSImage 中创建水印，我该怎么做..
任何人都可以提出建议来制作它..

最佳答案

像这样的东西:

float width = 10.0;
float height = 10.0;

NSImage *finalImage = [[NSImage alloc] initWithSize:NSMakeSize(width, height)];

//  obtain images - your sources may vary
NSImage *overlay = [[NSImage alloc] initWithData:[NSData dataWithContentsOfFile:@"/path/to/overlay_image.jpg"]];
NSImage *mainImage = [[NSImage alloc] initWithData:[NSData dataWithContentsOfFile:@"/path/to/main_image.jpg"]];

[finalImage lockFocus];

// draw the base image
[mainImage drawInRect:NSMakeRect(0, 0, width, height)
                      fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];

// draw the overlay image at some offset point
[overlay drawInRect:NSMakeRect(10, 10, [overlay size].width, [overlay size].height)
             fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];

[finalImage unlockFocus];

NSData *finalData = [finalImage TIFFRepresentation];

[[[NSBitmapImageRep imageRepWithData:finalData] representationUsingType:NSJPEGFileType properties:nil] writeToFile:[NSString stringWithFormat:@"/path/to/folder/new_image.jpg"] atomically:YES];

关于macos - 如何在mac应用程序中的NSImage中创建水印，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/12369302/