Accessing View in awakeFromNib?

Question

I have been trying to set a UIImageView background color (see below) in awakeFromNib

[imageView setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alp         


        

Answer 1

I know, this post is a bit older, but I recently had a similar problem and would like to share its solution with you.

Having subclassed NSTextView, I wanted to display the row colors in alternating orders. To be able to alter the colors from outside, I added two instance vars to my subclass, XNSStripedTableView:

@interface XNSStripedTableView : NSTableView {

    NSColor *pColor; // primary color
    NSColor *sColor; // secondary color
}

@property (nonatomic, assign) NSColor *pColor;
@property (nonatomic, assign) NSColor *sColor;

@end

Overwriting highlightSelectionInClipRect: does the trick to set the correct color for the respective clipRect.

- (void)highlightSelectionInClipRect:(NSRect)clipRect

{

float rowHeight = [self rowHeight] + [self intercellSpacing].height;
NSRect visibleRect = [self visibleRect];
NSRect highlightRect;

highlightRect.origin = NSMakePoint(NSMinX(visibleRect), (int)(NSMinY(clipRect)/rowHeight)*rowHeight);
highlightRect.size = NSMakeSize(NSWidth(visibleRect), rowHeight - [self intercellSpacing].height);

while (NSMinY(highlightRect) < NSMaxY(clipRect)) {

    NSRect clippedHighlightRect = NSIntersectionRect(highlightRect, clipRect);
    int row = (int) ((NSMinY(highlightRect)+rowHeight/2.0)/rowHeight);
    NSColor *rowColor = (0 == row % 2) ? sColor : pColor;
    [rowColor set];
    NSRectFill(clippedHighlightRect);
    highlightRect.origin.y += rowHeight;
}

[super highlightSelectionInClipRect: clipRect];

}

The only problem now is, where to set the initial values for pColor and sColor? I tried awakeFromNib:, but this would cause the debugger to come up with an error. So I dug into the problem with NSLog: and found an easy but viable solution: setting the initial values in viewWillDraw:. As the objects are not created calling the method the first time, I had to check for nil.

- (void)viewWillDraw {

if ( pColor == nil ) 
    pColor = [[NSColor colorWithSRGBRed:0.33 green:0.33 blue:0 alpha:1] retain];

if ( sColor == nil ) 
    sColor = [[NSColor colorWithSRGBRed:0.66 green:0.66 blue:0 alpha:1] retain];

}

I do think this solution is quite nice :-) although one could reselect the names of pColor and sColor could be adjusted to be more "human readable".