cocoa - 选择时 NSTextFieldCell 的文本属性已更改

Question

我有一个表格 View ，在该 View 上选择一行的一列将调用重写的方法

- (void)selectWithFrame:(NSRect)inCellFrame inView:(NSView *)inControlView editor:(NSText *)textObj delegate:(id)anObject start:(NSInteger)selStart length:(NSInteger)selLength {
  // here do some text positioning
         [super selectWithFrame:inCellFrame inView:inControlView editor:textObj delegate:anObject start:selStart length:selLength];
}

我还返回单元格的字段编辑器，如下所示:

- (NSTextView *)fieldEditorForView:(NSView *)inControlView {
   MYTextView* fieldEditor = [[[MYTextView alloc] initWithFrame:NSZeroRect] autorelease];
   return fieldEditor;
}

当选择单元格时，单元格内的文本会更改其属性。比如，字体大小、字体、字体样式等都会相应变化，当文本处于选择模式时，似乎我无法控制它。即使选择后我也不想更改其字体属性如何避免文本属性的这种更改？

Answer 1

调用-[super selectWithFrame:...]方法后，文本属性的更改将得到反射(reflect)。解决办法如下:

- (void)selectWithFrame:(NSRect)inCellFrame
                 inView:(NSView *)inControlView
                 editor:(NSText *)textObj
               delegate:(id)anObject
                  start:(NSInteger)selStart
                 length:(NSInteger)selLength {
    // here do some text positioning

    [super selectWithFrame:inCellFrame
                    inView:inControlView
                    editor:textObj
                  delegate:anObject
                     start:selStart
                    length:selLength];

    NSMutableAttributedString* text = [textObj textStorage];

    NSMutableParagraphStyle *alignmentStyle = [[NSParagraphStyle defaultParagraphStyle] autorelease];
    [alignmentStyle setAlignment:NSLeftTextAlignment];

    NSDictionary* attributes = [NSMutableDictionary dictionary];
    [attributes setValue:[NSFont boldSystemFontOfSize:[NSFont systemFontSize]] forKey:NSFontAttributeName];
    [attributes setValue:leftAlignmentStyle forKey:NSParagraphStyleAttributeName];

    [text setAttributes:attributes range:NSMakeRange(0, [text length])];
}