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我有一个NSTableView(基于视图)创建一个行;Autolayout在基于视图的NSTableView中
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
TaskTableCellView *tableCellView = [[TaskTableCellView alloc] init];
return tableCellView;
}
-(void) tableView:(NSTableView *)tableView didAddRowView:(NSTableRowView *)rowView forRow:(NSInteger)row {
NSView *view = [rowView viewAtColumn:0];
[view setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *views = NSDictionaryOfVariableBindings(view);
[tableView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[view]|" options:0 metrics:nil views:views]];
[tableView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[view]|" options:0 metrics:nil views:views]];
}
- (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row {
return 20;
}
此行创建一些子视图并分配一些约束;
- (void)layout {
[super layout];
ViewWithBackground *viewWithBackground = [[ViewWithBackground alloc] init];
viewWithBackground.backgroundColor = [NSColor greenColor];
[self addSubview:viewWithBackground];
[viewWithBackground setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *views = NSDictionaryOfVariableBindings(viewWithBackground);
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[viewWithBackground]|"
options:0
metrics:nil
views:views]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[viewWithBackground]|"
options:0
metrics:nil
views:views]];
[viewWithBackground setContentHuggingPriority:200 forOrientation:NSLayoutConstraintOrientationVertical];
[viewWithBackground setContentHuggingPriority:200 forOrientation:NSLayoutConstraintOrientationHorizontal];
}
- (void)drawRect:(NSRect)dirtyRect {
[[NSColor redColor] set];
NSRectFill(dirtyRect);
[super drawRect:dirtyRect];
}
乐趣开始当我真正尝试编辑约束.. viewWithBackground只是一个空的NSView,设置它的背景。当约束是| [viewWithBackground] |时对于水平和垂直方向,我都会得到预期的结果 - 绿色的行。当我将其更改为最基本的| - [viewWithBackground] - |时,我会得到一个意想不到的结果 - 红色的行,并且没有我的绿色视图标志!
我应该在这里采取一些额外的步骤吗?我的目标是让我的viewWithBackground实际上是一个稍微小一点的视图,以伪造行之间的“间隙”和距离桌面视图边缘的间距..