splitView上的奇怪行爲：（NSSplitView *）splitView resizeSubviewsWithOldSize：（NSSize）os中的oldSize x Lion

Question

我正在構建一個具有兩個拆分視圖（右側拆分視圖中的一個拆分視圖）的應用程序 但我遇到問題升級到OS X Lion後。

當您使用右下方調整大小操作時，應用程序崩潰，即同時更改高度和寬度。

當我註釋掉這段代碼時，奇怪的行爲消失了，但是拆分視圖會崩潰，這是我不想要的。

（ - （BOOL）SPLITVIEW：（NSSplitView *）SPLITVIEW canCollapseSubview：（的NSView *）子視圖）是一個沒有返回

-(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]; } 

系統崩潰日誌：

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 
) 

Answer 1

發現，這是一個奇怪的方法來做到這一點。

Cocoa With Love有一個很好的教程！