Question

如何使用鼠标在超级视图内移动子视图（使用osx 10.6）？我使用for循环以编程方式创建了五个NSimageView作为子视图。如何选择和拖动每个图像视图

Answer 1

简而言之，您希望使子视图拖动源，并使目标视图成为目标。这意味着实现类似NSDraggingSource和NSDraggingDestination协议的东西。

看一下Apple的Drag＆amp; amp;删除文档： https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DragandDrop

Answer 2

最后我得到了答案

    - (id)initWithFrame:(NSRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
    }
    return self;
}

- (NSView *)hitTest:(NSPoint)aPoint
{
    NSEnumerator *subviews = [[self subviews] objectEnumerator]  ;
    NSView  *hitView    ;
    NSLog(@"hit");
    fHitView = nil  ;
    while (hitView = [subviews nextObject]) {
        NSRect  frame = [hitView frame] ;       

        if (NSPointInRect(aPoint,frame))
            if ([hitView isKindOfClass:[DraggableView class]] && ![(DraggableView *)hitView dragEnabled]) {
                return hitView   ;
            }
            else    {
                fHitView = hitView  ;
                fHitPoint = aPoint   ;
                fFrameWhenHit = [hitView frame]   ;
                return self   ;
            }
    }

    return nil  ;
}


- (void)mouseDragged:(NSEvent *)theEvent
{
    if (fHitView != nil)    {
        NSPoint locationInWindow = [theEvent locationInWindow]  ;
        NSPoint locationInMySelf = [self convertPoint:locationInWindow fromView:[[self window] contentView]]    ;

        [fHitView setFrame:NSOffsetRect(fFrameWhenHit,locationInMySelf.x - fHitPoint.x, locationInMySelf.y - fHitPoint.y)]  ;
        [self setNeedsDisplay:YES]  ;
    }
}

插入NSview的子类并将NScustomView类的类名更改为子类名...

如何在超级视图中移动子视图

2 个答案: