contentsize and contentOffset equivalent in NSScro

问题:

I am porting an app from Ipad to mac. (I know that it sounds weird)

I stuck with NSScrollview. Please guide me contentsize , contentOffset equivalent in NSScrollview.

回答1:

UIScrollView* uiScroll;
uiScroll.contentSize;
uiScroll.contentOffset;
uiScroll.contentSize = CGSizeMake(w,h);
uiScroll.contentOffset = CGPointMake(x,y);

=

NSScrollView* nsScroll;
nsScroll.documentView.frame.size;
nsScroll.documentVisibleRect.origin;
nsScroll.documentView.frameSize = NSMakeSize(w,h);
[nsScroll.documentView scrollPoint:NSMakePoint(x,y)];

Edit: modernized the syntax

回答2:

In addition to the lines from @aepryus, here are a couple more useful lines for getting/setting the scroll offset on macOS:

//Get the current scroll offset:
_contentViewOffset = scrollView.contentView.bounds.origin;

//Set the scroll offset from the retrieved point:
NSPoint scrollPoint = [scrollView.contentView convertPoint:_contentViewOffset toView:scrollView.documentView];
[scrollView.documentView scrollPoint:scrollPoint];

回答3:

Everything you need to know about NSScrollView is laid out in the Scroll View Programming Guide for Cocoa provided in the documentation.

Although it doesn't appear that there's a direct equivalent, UIScrollView's contentSize can be likened to the size of NSScrollView's documentView, which is the scrollable content provided as an NSView to NSScrollView with setDocumentView:.

setContentOffset: can be compared to NSView's scrollPoint:, which uses an NSPoint to specify the offset of the documentView within the NSScrollView.

See the documentation for elaboration and code examples.