Question

您好我正在尝试使用UIView对UIPinchGestureRecognizer进行拆分，但如果有人知道如何妥善解决，则会出现以下问题。

这是我的pinchGestureHandlerCode：

- (IBAction)splitView:(UIPinchGestureRecognizer*)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateBegan)
    {
        CGPoint selectedFolderPoint = CGPointMake([recognizer locationInView:recognizer.view].x,
                                          recognizer.view.frame.origin.y);
        self.splitPosition = ([recognizer locationOfTouch:0 inView:recognizer.view].x +
                      [recognizer locationOfTouch:1 inView:recognizer.view].x)/2;


    //STEP 1: Capture the Main View Content into an image
    [self captureImageFromPointAndSetupMaskView:selectedFolderPoint];
}
else if(recognizer.state == UIGestureRecognizerStateChanged)
{
     CGPoint selectedFolderPoint = CGPointMake(recognizer.scale,
                                          recognizer.view.frame.origin.y);

    //STEP 2: Reduce the left image width, and move the right image origin according to the finger move of user.
    [self layoutBottomPartOfMainViewRelativeToPointInMainView:selectedFolderPoint];


    [UIView beginAnimations:@"split" context:NULL];
    [UIView setAnimationDuration:0.1];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
    //captures the main background view's image

    //STEP 3- Push The Layer-3 which hosts the other part of the Main Content View
    [UIView commitAnimations];

}
else if(recognizer.state == UIGestureRecognizerStateEnded)
{
    // STEP 3: remove the both image view from the view.
    [self layoutFinalFrameOfBottomPartOfMainContentView];
    [UIView commitAnimations];
}

}

STEMP 1方法：

-(void)captureImageFromPointAndSetupMaskView:(CGPoint)selectedFolderPoint
{
    UIGraphicsBeginImageContext(self.superview.frame.size);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *backgroundImage = UIGraphicsGetImageFromCurrentImageContext();

    CGImageRef leftTempRef = backgroundImage.CGImage;
    CGImageRef leftImageRef = CGImageCreateWithImageInRect(leftTempRef,

CGRectMake（self.bounds.origin.x， self.bounds.origin.y，selectedFolderPoint.x， self.bounds.size.height））;

    UIImage *leftImage = [UIImage imageWithCGImage:leftImageRef];

    leftImageBackgroundView = [[UIImageView alloc] initWithImage:leftImage];
    [self.leftBackgroundView addSubview:leftImageBackgroundView];

    CGImageRef rightTempRef = backgroundImage.CGImage;
    CGImageRef rightImageRef = CGImageCreateWithImageInRect(rightTempRef,

CGRectMake（selectedFolderPoint.x， self.bounds.origin.y，self.superview.bounds.size.width，self.bounds.size.height））;

    UIImage *rightImage = [UIImage imageWithCGImage:rightImageRef];

    rightImageBackgroundView = [[UIImageView alloc] initWithImage:rightImage];
    [self.rightBackgroundView addSubview:rightImageBackgroundView];



    [self.leftBackgroundView setFrame:CGRectMake(self.bounds.origin.x,
                                             self.bounds.origin.y,
                                             selectedFolderPoint.x,
                                             self.frame.size.height)];

    [self.rightBackgroundView setFrame:CGRectMake(selectedFolderPoint.x,
                                              self.bounds.origin.y,
                                              self.superview.bounds.size.width,
                                              self.bounds.size.height)];
}

第2步方法：

-(void)layoutBottomPartOfMainViewRelativeToPointInMainView:(CGPoint)selectedFolderPoint
{
[self.leftBackgroundView setFrame:CGRectMake(self.leftBackgroundView.bounds.origin.x,
                                             self.leftBackgroundView.bounds.origin.y,
                                             (self.leftBackgroundView.bounds.size.width -
                                                selectedFolderPoint.x),
                                             self.leftBackgroundView.bounds.size.height)];

[self.rightBackgroundView setFrame:CGRectMake(self.rightBackgroundView.frame.origin.x + selectedFolderPoint.x,
                                              self.rightBackgroundView.bounds.origin.y,
                                              self.rightBackgroundView.bounds.size.width - selectedFolderPoint.x,
                                              self.rightBackgroundView.bounds.size.height)];

if(((ABS(self.leftBackgroundView.bounds.origin.x+self.leftBackgroundView.bounds.size.width)-
     self.rightBackgroundView.bounds.origin.x) > 100) &&
   ((ABS(self.leftBackgroundView.bounds.origin.x+self.leftBackgroundView.bounds.size.width)-
     self.rightBackgroundView.bounds.origin.x) < 110))
{
    [self switchView];
    NSDictionary *message;
    [self.timelineController sendEvent:SWITCH_VIEW withMessage:message];
    [self layoutFinalFrameOfBottomPartOfMainContentView];

}
[UIView setAnimationsEnabled:NO];
[UIView setAnimationsEnabled:YES];
}

第3步方法：

-(void)layoutFinalFrameOfBottomPartOfMainContentView
 {
     [self.leftBackgroundView setFrame:CGRectMake(self.bounds.origin.x,
                                             self.leftBackgroundView.bounds.origin.y,
                                             self.bounds.origin.x,
                                               self.leftBackgroundView.bounds.size.height)];

     [self.rightBackgroundView setFrame:CGRectMake(self.bounds.origin.x,
                                              self.rightBackgroundView.bounds.origin.y,
                                              self.bounds.origin.x,
                                              self.rightBackgroundView.bounds.size.height)];

    leftImageBackgroundView.image = nil;
    rightImageBackgroundView.image = nil;
}

问题是：

我正在尝试制作流畅的动画，但它的运行速度太快，突然向两侧移动。
如果我对同一个捏手势更多的时间应用程序崩溃并显示内存警告。

如果有人知道我在我的代码中做了什么错误，请帮助我解决问题，或者还有其他方法可以让同样的动画让位给我....

提前致谢......

Answer 1

像这样定义UIPinchGestureRecognizer

UIPinchGestureRecognizer *ges = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(split)];
[self addGestureRecognizer:ges];

和像这样的分割方法

- (void)split {
    CGRect f = self.frame;
    CGRect f1 = CGRectMake(CGRectGetMinX(f), f.origin.y, f.size.width/2, f.size.height);
    CGRect f2 = CGRectMake(CGRectGetMidX(f), f.origin.y, f.size.width/2, f.size.height);

    SplitView *view1 = [[[SplitView alloc] initWithFrame:f1] autorelease];
    [self.superview addSubview:view1];

    SplitView *view2 = [[[SplitView alloc] initWithFrame:f2] autorelease];
    [self.superview addSubview:view2];

    f1.origin.x -= 30;
    f2.origin.x += 30;

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    view1.frame = f1;
    view2.frame = f2;
    [UIView commitAnimations];

    [self removeFromSuperview];
}

如何制作流畅的UIView分割动画？

1 个答案: