我正在创建一个OSX PDF查看器应用程序。在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,会出现一个小预览窗口,显示该页面的预览。这在OSX 10.7和10.8下工作正常,但在Mavericks 10.9中,“自动缩放”选项确实似乎失去了它的效果。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 Mavericks:
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));
}
来自po [self.previewView _subtreeDescription]
的视图结构:
$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上使用setNeedsLayout:YES
和setNeedsDisplay:YES
进行了测试,没有任何变化。
有什么建议吗?
答案 0 :(得分:3)
试试这个:
self.pdfView.autoScales = NO;
self.pdfView.document = _currentDocument
self.pdfView.autoScales = YES;
它对我有用,所以对你有希望。
答案 1 :(得分:0)
在加载pdf
文档后尝试这样做:
[self.pdfView setDocument:pdfDoc];
[self.pdfView zoomIn:self];
[self.pdfView setAutoScales:YES];
答案 2 :(得分:0)
似乎是一个错误。通过调整超级视图来解决它。然后它会自动调整大小。
//int widthModifierForMavericksWorkaround = 1;
-(void)refresh
{
// Ugly workaround for Mavericks, resize view so it updates its scale
CGSize size = self.frame.size;
size.width += widthModifierForMavericksWorkaround;
[self resizeSubviewsWithOldSize:size];
widthModifierForMavericksWorkaround *= -1;
}