如何在超级视图中移动子视图 [英] how to move subviews inside a super view

问题描述

如何使用鼠标在超级视图(使用osx 10.6)中移动子视图?
我已经使用for循环以编程方式创建了五个NSimageView作为子视图. 如何选择并拖动每个图像视图

how to move subviews inside a super view (using osx 10.6) using mouse?
i have programmatically created five NSimageView's as subviews using for loop.. how to select and drag each imageview

推荐答案

最终我得到了答案

    - (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类的类名称更改为子类名称...

insert into subclass of NSview and change the class name of NScustomView class as subclass name...

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