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objective-cnsviewnssavepanel

Saving an NSView to a png file?

I am making a simple program that creates game cards for a game I play. I have sent it out to some friends of mine for testing, but they really want it to save images, not just print them. I have tried to make it save as a .png file. I have to questions here.

  • How can I make it save my view as a .png file, including all of the view's NSImageWells.

  • How can I add an NSPopupButton to an NSSavePanel to allow users to select a format?

Any help is greatly appreciated.

Solution

  • First create a TIFF representation of your view:

    // Get the data into a bitmap.
[self lockFocus];
rep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:[self bounds]];
[self unlockFocus];
data = [rep TIFFRepresentation];

    To support multiple file types, use:

    data = [rep representationUsingType:(NSBitmapImageFileType)storageType
properties:(NSDictionary *)properties];

    NSBitmapImageFileType is an enum constant specifying a file type for bitmap images. It can be NSBMPFileType, NSGIFFileType, NSJPEGFileType, NSPNGFileType, or NSTIFFFileType.

    If you need to customize the NSSavePanel, look into accessory views: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/AppFileMgmt/Articles/ManagingAccessoryViews.html