Question

我有1个观点,分两个。其中一人比另一方高出10倍。我有一幅大奖(上台)。

我想能够把大片从护.者之间的一个 anchor点上穿pin。我只想把这种转变从同一个全球立场的基点进行,但却不改变自己的固定点。

我希望我解释自己。该守则是:

- (void)twoFingerPinch:(UIPinchGestureRecognizer *)gestureRecognizer { //this changes the anchor point of "big" without moving it [self adjustAnchorPointForGestureRecognizer:gestureRecognizer]; if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) { CGAffineTransform transform = CGAffineTransformScale([[gestureRecognizer view] transform], [gestureRecognizer scale], [gestureRecognizer scale]); float scale = sqrt(transform.a*transform.a+transform.c*transform.c); //this transforms "big" [gestureRecognizer view].transform = transform; //anchor point location in little view CGPoint pivote = [gestureRecognizer locationInView:little]; CGAffineTransform transform_t = CGAffineTransformConcat(CGAffineTransformMakeTranslation(-pivote.x, -pivote.y), transform); transform_t = CGAffineTransformConcat(transform_t, CGAffineTransformMakeTranslation(pivote.x, pivote.y)); little.transform = transform_t; } [gestureRecognizer setScale:1]; }

但是,这并不奏效,几乎看不出一气,一味.。

EDIT:更多信息。

Ok, this is the diagram:

红色广场是大观点,黑暗是一点。主要看法是混淆了。

The line: [self adjustAnchorPointForGestureRecognizer:gestureRecognizer]; changes the big views anchor point to the center of the pinch gesture. That works.

随着我大观点的推移,小观点应相应地扩大规模,从而按现在的大致观点集中处理。这就是说,它应该以与大观点相同的立足点加以扩大。

我希望,如果可能的话,这些转变不会在《气候变化公约》中看到什么观点。

Answer 1

最后,我发现奥基。我不知道这是否有助于找到更好的解决办法,但却是行之有效的。

- (void)twoFingerPinch:(UIPinchGestureRecognizer *)gestureRecognizer
{    
    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer];

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {    

        CGAffineTransform transform = CGAffineTransformScale([[gestureRecognizer view] transform], [gestureRecognizer scale], [gestureRecognizer scale]);
        float scale = sqrt(transform.a*transform.a+transform.c*transform.c);
        if((scale>0.1)&&(scale<20)) {

            [gestureRecognizer view].transform = transform;

            CGPoint anchor = [gestureRecognizer locationInView:little];
            anchor = CGPointMake(anchor.x - little.bounds.size.width/2, anchor.y-little.bounds.size.height/2);

            CGAffineTransform affineMatrix = little.transform;
            affineMatrix = CGAffineTransformTranslate(affineMatrix, anchor.x, anchor.y);
            affineMatrix = CGAffineTransformScale(affineMatrix, [gestureRecognizer scale], [gestureRecognizer scale]);
            affineMatrix = CGAffineTransformTranslate(affineMatrix, -anchor.x, -anchor.y);        
            little.transform = affineMatrix;    

            [eagleView setTransform:little.transform];    
            [gestureRecognizer setScale:1];
        }

    }
}

That 观点线,是我需要CGAffineTransform的真正原因,我不得不改变主线。我把它送往开放式利比里亚市场,以改变模式观点,改变矩阵。

现在,它通过用户反馈,同时进行3次变革(轮值、规模、翻译)。

http://www.ohchr.org。

仅略微注意到: 看来,当我把观点推向太快的时候, e言和“国际观点”似乎从一席就消失了。因此,我没有直接适用《国际调查意见》的变换,而是用View语适用。与此类似:

- (void)twoFingerPinch:(UIPinchGestureRecognizer *)gestureRecognizer
{    
    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer];

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {    

        CGAffineTransform transform = CGAffineTransformScale([[gestureRecognizer view] transform], [gestureRecognizer scale], [gestureRecognizer scale]);
        float scale = sqrt(transform.a*transform.a+transform.c*transform.c);
        if((scale>0.1)&&(scale<20)) {

            //[gestureRecognizer view].transform = transform;

            CGPoint anchor = [gestureRecognizer locationInView:little];
            anchor = CGPointMake(anchor.x - little.bounds.size.width/2, anchor.y-little.bounds.size.height/2);

            CGAffineTransform affineMatrix = little.transform;
            affineMatrix = CGAffineTransformTranslate(affineMatrix, anchor.x, anchor.y);
            affineMatrix = CGAffineTransformScale(affineMatrix, [gestureRecognizer scale], [gestureRecognizer scale]);
            affineMatrix = CGAffineTransformTranslate(affineMatrix, -anchor.x, -anchor.y);        
            //little.transform = affineMatrix;    

            [eagleView setTransform:affineMatrix];    
            [gestureRecognizer setScale:1];

            CGAffineTransform transform = CGAffineTransformMakeRotation(eaglView.myRotation*M_PI/180);
            transform = CGAffineTransformConcat(CGAffineTransformMakeScale(eaglView.myScale, eaglView.myScale), transform);
            transform = CGAffineTransformConcat(transform, CGAffineTransformMakeTranslation(eaglView.myTranslate.x, -eaglView.myTranslate.y));    
            little.transform = transform;
            big.transform = transform;
        }

    }
}

Answer 2

如果把胎圈中心作为 anchor点来扩大较小的视野,那么,你需要手头计算新位置:

CGRect frame = little.frame; // Returns the frame based on the current transform
frame.origin.x = (frame.origin.x - pivot.x) * gestureRecognizer.scale;
frame.origin.y = (frame.origin.y - pivot.y) * gestureRecognizer.scale;
frame.width = frame.width * gestureRecognizer.scale;
frame.height = frame.height * gestureRecognizer.scale;

然后更新变革。从个人角度讲,我将根据真实立场而不是改变目前的转变来这样做——我觉得更容易思考。例如:

little.transform = CGAffineTransformIndentity; // Remove the current transform
CGRect orgFrame = little.frame
CGFloat scale = frame.width / orgFrame.size.width;
CGAffineTransform t = CGAffineTransformMakeScale(scale, scale);
t = CGAffineTransformConcat(t, CGAffineTransformMakeTranslation(newFrame.origin.x - frame.origin.x, newFrame.origin.y - frame.origin.y));
little.transform = t;

请注意,我刚才在《法典》中把你和想法放在我头上。它需要测试和分解!

此外,如果你根据原始基体使用比额表价值,而不是每次重新制定,然后改变变化,则可以删除其中部分。

时间

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