Question

我编写了一个用于裁剪目的的代码。场景就像，它有4个uiviews

1）上 2）左侧 3）右
4）底部

每个uiview根据所需的更改调整大小，主uiview具有包含图像的uiimageview。当我在iPhone 3，3GS，iPad 2，iPad 4上运行代码时它工作正常，但是当我在iPhone 4G上运行时，它会产生非常不希望的结果。我知道我的代码计算很好，这就是为什么它们在除iPhone 4G之外的每个设备上都能正常工作。问题是什么？有任何想法吗？ uiview计算是否与iPhone 4或其他任何原因不同？

    - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    //    messageLabel.text = @"Drag Detected";

commonCropT = leftRect.frame.origin.y; // left.y or Right.y or Top.H is same thing
commonCropB = lowerRect.frame.origin.y;// left.H or Right.H or lower.y is same thing    
commonCropL = leftRect.frame.size.width; //
commonCropR = rightRect.frame.origin.x;//
commonCropH = leftRect.frame.size.height;// left.width and right.width

leftYT = leftRect.frame.origin.y;
leftH = leftRect.frame.size.height;
leftYB = leftYT + leftH;
leftW = leftRect.frame.size.width; // leftXR


rightXL = rightRect.frame.origin.x;
rightW = rightRect.frame.size.width;
rightXR = rightXL + rightW;
rightYT = rightRect.frame.origin.y; 
rightH = rightRect.frame.size.height;
rightYB = rightH + rightYT;

if (isTappedOnUpperLeftCorner)
{
    if (commonCropR - movedPoint.x <= kWidthDifference)
        return;

    if (movedPoint.y < commonCropT )
    {
        commonCropH  = commonCropH + (commonCropT - movedPoint.y); 
    }
    else if (movedPoint.y > commonCropT )
    {
        if (commonCropB - movedPoint.y <= kHeightDifference ) {
            return;
        }
        commonCropH  = commonCropH - (movedPoint.y - commonCropT); 
    }

    commonCropL = movedPoint.x;
    commonCropT = movedPoint.y;

    NSLog(@" cropW = %d ",cropW);

    [upperRect setFrame:CGRectMake(upperRect.frame.origin.x, upperRect.frame.origin.y, upperRect.frame.size.width, commonCropT)];
    [leftRect setFrame:CGRectMake(leftRect.frame.origin.x, commonCropT, commonCropL, commonCropH)]; 
    [rightRect setFrame:CGRectMake(commonCropR, commonCropT, rightRect.frame.size.width, commonCropH)];  

}


}

commonCropT = leftRect.frame.origin.y; // left.y or Right.y or Top.H is same thing
commonCropB = lowerRect.frame.origin.y;// left.H or Right.H or lower.y is same thing    
commonCropL = leftRect.frame.size.width; //
commonCropR = rightRect.frame.origin.x;//
commonCropH = leftRect.frame.size.height;// left.width and right.width

leftYT = leftRect.frame.origin.y;
leftH = leftRect.frame.size.height;
leftYB = leftYT + leftH;
leftW = leftRect.frame.size.width; // leftXR


rightXL = rightRect.frame.origin.x;
rightW = rightRect.frame.size.width;
rightXR = rightXL + rightW;
rightYT = rightRect.frame.origin.y; 
rightH = rightRect.frame.size.height;
rightYB = rightH + rightYT;

if (isTappedOnUpperLeftCorner)
{
    if (commonCropR - movedPoint.x <= kWidthDifference)
        return;

    if (movedPoint.y < commonCropT )
    {
        commonCropH  = commonCropH + (commonCropT - movedPoint.y); 
    }
    else if (movedPoint.y > commonCropT )
    {
        if (commonCropB - movedPoint.y <= kHeightDifference ) {
            return;
        }
        commonCropH  = commonCropH - (movedPoint.y - commonCropT); 
    }

    commonCropL = movedPoint.x;
    commonCropT = movedPoint.y;

    NSLog(@" cropW = %d ",cropW);

    [upperRect setFrame:CGRectMake(upperRect.frame.origin.x, upperRect.frame.origin.y, upperRect.frame.size.width, commonCropT)];
    [leftRect setFrame:CGRectMake(leftRect.frame.origin.x, commonCropT, commonCropL, commonCropH)]; 
    [rightRect setFrame:CGRectMake(commonCropR, commonCropT, rightRect.frame.size.width, commonCropH)];  

}

Answer 1

我相信你遇到的问题类似于我所看到的问题。利用视网膜显示器，触摸坐标可以是非整数的，例如， 23.5。如果对视图的框架使用非整数值，则可能会遇到此类行为。似乎UIView不支持非整数值。

在计算中的某个点使用roundf（）或类似函数来避免此问题。

uiview调整iphone 4G的大小和操作问题

1 个答案: