我正在构建一个具有两个拆分视图的应用程序（一个拆分视图在右侧拆分视图中）但是在升级到 OS X Lion 后我遇到了问题。
当您使用右下调整大小操作时，应用程序会崩溃，即同时更改高度和宽度。
当我注释掉这段代码时，奇怪的行为消失了，但是拆分视图会崩溃，这是我不想要的。
(-(BOOL)splitView:(NSSplitView *)splitView canCollapseSubview:(NSView *)subview) 不返回
-(void)splitView:(NSSplitView *)splitView resizeSubviewsWithOldSize:(NSSize)oldSize {
NSRect newFrame = [splitView frame]; // get the new size of the whole splitView
if (newFrame.size.width == oldSize.width) { // if the width hasn't changed
[splitView adjustSubviews]; // tell sender to adjust subviews
return;
}
// grab the splitviews
NSView *left = [[splitView subviews] objectAtIndex:0];
NSView *right = [[splitView subviews] objectAtIndex:1];
float dividerThickness = [splitView dividerThickness];
// get the different frames
NSRect leftFrame = [left frame];
NSRect rightFrame = [right frame];
// change in width for this redraw
int dWidth = newFrame.size.width - oldSize.width;
if ([splitView.identifier isEqualToString:@"MainSplitView"])
{
// ratio of the left frame width to the right used for resize speed when both panes are being resized
float rLeftRight = (leftFrame.size.width - MainMIN_LEFT_PANEL_W) / rightFrame.size.width;
// resize the height of the left
leftFrame.size.height = newFrame.size.height;
leftFrame.origin = NSMakePoint(0,0);
// resize the left & right pane equally if we are shrinking the frame
// resize the right pane only if we are increasing the frame
// when resizing lock at minimum width for the left panel
if(leftFrame.size.width <= MainMIN_LEFT_PANEL_W && dWidth < 0) {
rightFrame.size.width += dWidth;
} else if(dWidth > 0) {
rightFrame.size.width += dWidth;
} else {
leftFrame.size.width += dWidth * rLeftRight;
rightFrame.size.width += dWidth * (1 - rLeftRight);
}
rightFrame.size.width = newFrame.size.width - leftFrame.size.width - dividerThickness;
rightFrame.size.height = newFrame.size.height;
rightFrame.origin.x = leftFrame.size.width + dividerThickness;
}
else if ([splitView.identifier isEqualToString:@"SecondSplitView"])
{
//NSView *MainRight = [[SplitView subviews] objectAtIndex:1];
//float MinWidth = MainRight.frame.size.width - SubMIN_RIGHT_PANEL_W;
// ratio of the left frame width to the right used for resize speed when both panes are being resized
float rLeftRight = (rightFrame.size.width - SubMIN_RIGHT_PANEL_W) / leftFrame.size.width;
// resize the height of the left
leftFrame.size.height = newFrame.size.height;
leftFrame.origin = NSMakePoint(0,0);
// resize the left & right pane equally if we are shrinking the frame
// resize the right pane only if we are increasing the frame
// when resizing lock at minimum width for the left panel
if(rightFrame.size.width <= SubMIN_RIGHT_PANEL_W && dWidth < 0) {
leftFrame.size.width += dWidth;
} else if(dWidth > 0) {
leftFrame.size.width += dWidth;
} else {
rightFrame.size.width += dWidth * rLeftRight;
leftFrame.size.width += dWidth * (1 - rLeftRight);
}
leftFrame.size.width = newFrame.size.width - rightFrame.size.width - dividerThickness;
leftFrame.size.height = newFrame.size.height;
rightFrame.origin.x = leftFrame.size.width + dividerThickness;
}
[left setFrame:leftFrame];
[right setFrame:rightFrame]; }
崩溃日志：
2011-08-24 18:36:15.670 MyApplication[29947:407] -[NSTextFieldCell length]: unrecognized selector sent to instance 0x10231a1c0
2011-08-24 18:36:15.672 MyApplication[29947:407] -[NSTextFieldCell length]: unrecognized selector sent to instance 0x10231a1c0
2011-08-24 18:36:15.675 MyApplication[29947:407] (
0 CoreFoundation 0x00007fff8cd31986 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8be11d5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff8cdbd5ae -[NSObject doesNotRecognizeSelector:] + 190
3 CoreFoundation 0x00007fff8cd1e803 ___forwarding___ + 371
4 CoreFoundation 0x00007fff8cd1e618 _CF_forwarding_prep_0 + 232
5 CoreFoundation 0x00007fff8cc95176 CFStringGetLength + 118
6 CoreFoundation 0x00007fff8cc99d91 CFStringAppend + 241
7 CoreFoundation 0x00007fff8cc94c18 __CFStringAppendFormatCore + 11448
8 CoreFoundation 0x00007fff8cce73eb _CFStringCreateWithFormatAndArgumentsAux + 107
9 CoreFoundation 0x00007fff8cd5f7c2 _CFLogvEx + 114
10 Foundation 0x00007fff95aa153f NSLogv + 89
11 Foundation 0x00007fff95aa14dd NSLog + 130
12 AppKit 0x00007fff91cf1bc6 -[NSSplitView _validateSubviewFrames] + 2004
13 AppKit 0x00007fff91cb4e31 -[NSSplitView resizeSubviewsWithOldSize:] + 739
14 AppKit 0x00007fff91b9d5e5 -[NSView setFrameSize:] + 955
15 AppKit 0x00007fff91b9ce9a -[NSView setFrame:] + 268
16 AppKit 0x00007fff91c791a0 -[NSView resizeWithOldSuperviewSize:] + 1040
17 AppKit 0x00007fff91c78d15 -[NSView resizeSubviewsWithOldSize:] + 200
18 AppKit 0x00007fff91b9d5e5 -[NSView setFrameSize:] + 955
19 AppKit 0x00007fff91cb0899 -[NSWindow _oldPlaceWindow:] + 1551
20 AppKit 0x00007fff91c5b7bb -[NSWindow _setFrameCommon:display:stashSize:] + 1948
21 AppKit 0x00007fff91c5b019 -[NSWindow setFrame:display:] + 60
22 AppKit 0x00007fff91cab9db -[NSWindow(NSWindowResizing) _resizeWithEvent:] + 1223
23 AppKit 0x00007fff91cab4af -[NSTitledFrame mouseDown:] + 187
24 AppKit 0x00007fff91cab3c1 -[NSThemeFrame mouseDown:] + 626
25 AppKit 0x00007fff91c2b66e -[NSWindow sendEvent:] + 6280
26 AppKit 0x00007fff91bc3f19 -[NSApplication sendEvent:] + 5665
27 AppKit 0x00007fff91b5a42b -[NSApplication run] + 548
28 AppKit 0x00007fff91dd852a NSApplicationMain + 867
29 MyApplication 0x0000000100001e42 main + 34
30 MyApplication 0x0000000100001e14 start + 52
)