ios - 如何从起点和滚动点查找端点坐标
<p><p>我必须从起点和移动点找到端点。</p>
<p>我正在制作动画，当用户拖动 View 时我需要移动 <code>View</code> 然后我必须将其从屏幕中移出并返回原点。</p>
<p>现在我使用 <strong>UISwipeGestureRecognizer</strong> 来检测 Move 上的滑动。以下是代码。</p>
<pre><code> UISwipeGestureRecognizer *swipeLeft = [ initWithTarget:self action:@selector(handleSwipe:)];
UISwipeGestureRecognizer *swipeRight = [ initWithTarget:self action:@selector(handleSwipe:)];
UISwipeGestureRecognizer *swipeUp = [ initWithTarget:self action:@selector(handleSwipe:)];
UISwipeGestureRecognizer *swipeDown = [ initWithTarget:self action:@selector(handleSwipe:)];
// Setting the swipe direction.
;
;
;
;
// Adding the swipe gesture on image view
;
;
;
;
</code></pre>
<p><strong>处理滑动</strong> </p>
<pre><code>- (void)handleSwipe:(UISwipeGestureRecognizer *)swipe {
CGPoint movedPoint = ;
if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {
NSLog(@"Left Swipe");
CGPoint startPoint = _view1.frame.origin;
//Diffence Moved
float movedDiffence_X = startPoint.x - movedPoint.x;
float movedDiffence_Y = startPoint.y - movedPoint.y;
//How can I find END POINT BASED ON THIS DATA
[UIView animateWithDuration:1 animations:^{
_view1.center = CGPointMake(movedDiffence_X *3,movedDiffence_Y *3 );
_view1.transform = CGAffineTransformMakeRotation(-0.86);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.8 animations:^{
_view1.center = CGPointMake(84, 240);
_view1.transform = CGAffineTransformMakeRotation(0.36);
} completion:^(BOOL finished) {
}];
}];
}
if (swipe.direction == UISwipeGestureRecognizerDirectionRight) {
NSLog(@"Right Swipe");
CGPoint startPoint = _view1.frame.origin;
//Diffence Moved
float movedDiffence_X = startPoint.x - movedPoint.x;
float movedDiffence_Y = startPoint.y - movedPoint.y;
//How can I find
[UIView animateWithDuration:1 animations:^{
_view1.center = CGPointMake(movedDiffence_X *3,movedDiffence_Y *3 );
_view1.transform = CGAffineTransformMakeRotation(-0.86);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.8 animations:^{
_view1.center = CGPointMake(84, 240);
_view1.transform = CGAffineTransformMakeRotation(0.36);
} completion:^(BOOL finished) {
}];
}];
}
if (swipe.direction == UISwipeGestureRecognizerDirectionUp) {
NSLog(@"Up Swipe");
CGPoint startPoint = _view1.frame.origin;
//Diffence Moved
float movedDiffence_X = startPoint.x - movedPoint.x;
float movedDiffence_Y = startPoint.y - movedPoint.y;
//How can I find
[UIView animateWithDuration:1 animations:^{
_view1.center = CGPointMake(movedDiffence_X *3,movedDiffence_Y *3 );
_view1.transform = CGAffineTransformMakeRotation(-0.86);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.8 animations:^{
_view1.center = CGPointMake(84, 240);
_view1.transform = CGAffineTransformMakeRotation(0.36);
} completion:^(BOOL finished) {
}];
}];
}
if (swipe.direction == UISwipeGestureRecognizerDirectionDown) {
NSLog(@"Down Swipe");
CGPoint startPoint = _view1.frame.origin;
//Diffence Moved
float movedDiffence_X = startPoint.x - movedPoint.x;
float movedDiffence_Y = startPoint.y - movedPoint.y;
//How can I find
[UIView animateWithDuration:1 animations:^{
_view1.center = CGPointMake(movedDiffence_X *3,movedDiffence_Y *3 );
_view1.transform = CGAffineTransformMakeRotation(-0.86);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.8 animations:^{
_view1.center = CGPointMake(84, 240);
_view1.transform = CGAffineTransformMakeRotation(0.36);
} completion:^(BOOL finished) {
}];
}];
}
}
</code></pre>
<p> <img src="/image/mMaL6.png" alt="enter image description here"/> </p>
<p>当我滑动第一 View 时，我可以在 <strong>SwipeHandler</strong> (handleSwipe) 方法中移动点</p>
<p>所以我也可以检测滑动方向。但我的问题是我必须通过No.1 View 走出屏幕。为此，我必须找到端点。</p>
<p>那么，如何从起点和移动点找到端点？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>这里是端点计算的链接。 <a href="http://library.thinkquest.org/20991/geo/coordgeo.html" rel="noreferrer noopener nofollow">http://library.thinkquest.org/20991/geo/coordgeo.html</a> </p></p>
<p style="font-size: 20px;">关于ios - 如何从起点和滚动点查找端点坐标，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/18569570/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/18569570/
</a>
</p>
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