Question

我为iPad创建了一个拼图引擎（iOS SDK 4.2）

我有一个控制UIView（rootView）的PuzzleViewController，它包含一个较小的UIView（puzzleView）和十二个拼图（PuzzlePieceView类扩展了UIImageView）。

意识形态非常简单。 puzzlePieces围绕puzzleView并被拾取并拖动到puzzleView。当拾取这些碎片时，它们的尺寸加倍并且居中于手指触摸的位置。当它们被放置在正确的位置时，它们会被放置（它们被从rootView中移除并作为子视图添加到puzzleView中），如果它们放在错误的位置，它们将返回到原始位置和大小。

目前我在PuzzlePieceView类中覆盖了触发/移动/结束/取消的触摸，以便每个PuzzlePiece控制它自己的动作。

这是他们做的事情

#pragma mark UIResponder overriding

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"PuzzlePiece touchesBegan");
    if (!isDeployed) {
        if (self.initialSize.width == 0 || self.initialSize.height ==0) { //if there is still no initial size
            self.initialSize = self.frame.size;
        }
        NSLog(@"self.initialLocation.x %f %f", self.initialLocation.x, self.initialLocation.y);
        if (self.initialLocation.x == 0. || self.initialLocation.y == 0.) { //if there is still no initial location
            self.initialLocation = self.center; //record the initial location
        }
        UITouch *touch = [[event allTouches] anyObject];
        self.center = [touch locationInView:self.superview]; //set the center of the view as the point where the finger touched it
        [self.superview bringSubviewToFront:self]; //the piece brings itself as frontMostView so that it is always visible and never behind any other piece while moving
    }
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"PuzzlePiece touchesMoved");
    if (self.frame.size.width == self.initialSize.width) {
        self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.image.size.width, self.image.size.height);
    }
    if (!isDeployed) {
        UITouch *touch = [[event allTouches] anyObject];
        self.center = [touch locationInView:self.superview]; //set the center of the view as the point where the finger moved to
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"PuzzlePiece touchesEnded");
    if (!isDeployed) {
        UITouch *touch = [[event allTouches] anyObject];
        NSLog(@"point %@ x%f y%f", self.puzzleView, [touch locationInView:self.puzzleView].x, [touch locationInView:self.puzzleView].y);
        if (CGRectContainsPoint(self.dropZone,[touch locationInView:self.puzzleView])) {
            [self removeFromSuperview];
            [self.puzzleViewController addPiece:self];
            self.center = self.finalCenter;
            self.isDeployed = YES;
        }
        else {
            [self restoreToInitialSize];
            [self restoreToInitialPosition];
        }
    }

}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"PuzzlePiece touchesCancelled");
    if (!isDeployed) {
        [self restoreToInitialSize];
        [self restoreToInitialPosition];
    } 
}

#pragma mark -

看起来非常简单，而且是。

我只剩下一个虫子了。当我尝试在任何puzzlePiece上进行水平移动时，触摸会取消。只有在快速启动移动时才会发生这种情况。如果我触摸这件作品并等待片刻（大约一秒钟），这些作品就会完美地移动。这些碎片也在垂直方向上完美移动。

我已经尝试过在第一次触摸视图时不改变puzzlePiece大小，但bug仍然存在......

Answer 1

我找到了解决方法。我的一个队友在RootView中注册了一个UISwipeGestureRecognizer而不是特定的子视图，应该识别swipeGesture。

水平移动UIView时出错

1 个答案: