我正在创建一个 OSX PDF 查看器应用程序。底部有一个水平滚动条,因此用户可以轻松地在页面之间滚动。滚动时会有一个小预览窗口显示该页面的预览。这在 OSX 10.7 和 10.8 下运行良好,但在 Mavericks 10.9 中,“自动缩放”选项似乎失去了效果。还有一个滚动条(即使将比例设置为不需要滚动条的值)。
关于如何解决这个问题的任何想法?
OSX 10.7 和 10.8:
OSX 小牛队:
设置视图的代码:
- (void)awakeFromNib
{
[super awakeFromNib];
[_pdfView setAutoScales:YES];
[_pdfView setDisplayMode:kPDFDisplayTwoUp];
[_pdfView setDisplaysPageBreaks:NO];
[self setWantsLayer:YES];
}
- (void)drawRect:(NSRect)dirtyRect
{
[super drawRect:dirtyRect];
CGContextRef context = (CGContextRef) [[NSGraphicsContext currentContext] graphicsPort];
CGContextSetRGBFillColor(context, 0.227,0.251,0.337,0.8);
CGContextFillRect(context, NSRectToCGRect(dirtyRect));
}
视图结构来自po [self.previewView _subtreeDescription]
:
$0 = 0x0000000113dcd280 [ A WLU#] h=&-& v=--& IBPreviewView 0x119554760 f=(730.097,47,300,200) b=(-) => <_NSViewBackingLayer: 0x110a5b800> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ O WlU ] h=-&- v=-&- PDFView 0x104cb9c20 f=(10,60,280,130) b=(-) => <_NSViewBackingLayer: 0x114e311a0> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF O wlU ] h=--- v=--- PDFViewScrollView 0x110a36c60 f=(0,0,280,130) b=(-) => <_NSViewBackingLayer: 0x110a374a0> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF O wlU ] h=--- v=--- PDFCenteringClipView 0x110a2ba30 f=(0,0,265,130) b=(0.5,0,-,-) => <_NSClipViewBackingLayer: 0x110a42b70> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF O WLU ] h=--- v=--- PDFMatteView 0x110a28730 f=(0,0,980,683) b=(-) => <_NSViewBackingLayer: 0x110a3b600> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ A LU ] h=--- v=--- PDFDisplayView 0x114e309b0 f=(0,0,980,683) b=(-) TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF wlU ] h=--- v=--- NSScroller 0x100766e50 f=(265,0,15,130) b=(-) => <_NSViewBackingLayer: 0x100766e20> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF wlU ] h=-&- v=-&- NSTextField 0x104c87110 f=(7,27,286,25) b=(-) => <_NSViewBackingLayer: 0x110a5b910> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
[ AF wlU ] h=-&- v=-&- NSTextField 0x110a2ef60 "76 av 152" f=(89,0,115,25) b=(-) => <_NSViewBackingLayer: 0x110a5b970> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
A=autoresizesSubviews, C=canDrawConcurrently, D=needsDisplay, F=flipped, G=gstate, H=hidden (h=by ancestor), L=needsLayout (l=child needsLayout), U=needsUpdateConstraints (u=child needsUpdateConstraints), O=opaque, P=preservesContentDuringLiveResize, S=scaled/rotated, W=wantsLayer (w=ancestor wantsLayer), #=has surface
我还在_pdfView 和 self 上进行了测试,没有任何改变setNeedsLayout:YES
。setNeedsDisplay:YES
有什么建议么?