「ios開発」UIGestureRecognizerでを識別するサンプルプログラム

2014年8月19日

1.一本の指で2度の手振を叩くジェスチャー
コード下記：
//ジェスチャー認識装置を作成
UITapGestureRecognizer *oneFingerTwoTaps =
[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerTwoTaps)] autorelease];

// Set required taps and number of touches
[oneFingerTwoTaps setNumberOfTapsRequired:2];
[oneFingerTwoTaps setNumberOfTouchesRequired:1];

// Add the gesture to the view
[[self view] addGestureRecognizer:oneFingerTwoTaps];

//メッセージメソッド　oneFingerTwoTaps
– (void)oneFingerTwoTaps
{
NSLog(@"Action: One finger, two taps");
}
2.2本の指で２度の手振りを叩くジェスチャー
コード下記：
UITapGestureRecognizer *twoFingersTwoTaps =
[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(twoFingersTwoTaps)] autorelease];
[twoFingersTwoTaps setNumberOfTapsRequired:2];
[twoFingersTwoTaps setNumberOfTouchesRequired:2];
[[self view] addGestureRecognizer:twoFingersTwoTaps];

//メッセージメソッドtwoFingersTwoTaps
– (void)twoFingersTwoTaps {
NSLog(@"Action: Two fingers, two taps");
}

3.上下スライドジェスチャー(指は上、下を向いて滑る)
コード下記：
// 上にスライドする
UISwipeGestureRecognizer *oneFingerSwipeUp =
[[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerSwipeUp:)] autorelease];
[oneFingerSwipeUp setDirection:UISwipeGestureRecognizerDirectionUp];
[[self view] addGestureRecognizer:oneFingerSwipeUp];

– (void)oneFingerSwipeUp:(UISwipeGestureRecognizer *)recognizer
{
CGPoint point = [recognizer locationInView:[self view]];
NSLog(@"Swipe up – start location: %f,%f", point.x, point.y);
}

// 下にスライドする
UISwipeGestureRecognizer *oneFingerSwipeDown =
[[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerSwipeDown:)] autorelease];
[oneFingerSwipeDown setDirection:UISwipeGestureRecognizerDirectionDown];
[[self view] addGestureRecognizer:oneFingerSwipeDown];

– (void)oneFingerSwipeDown:(UISwipeGestureRecognizer *)recognizer
{
CGPoint point = [recognizer locationInView:[self view]];
NSLog(@"Swipe down – start location: %f,%f", point.x, point.y);
}
4.ローテーションジェスチャー
コード下記：
UIRotationGestureRecognizer *twoFingersRotate =
[[[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(twoFingersRotate:)] autorelease];
[[self view] addGestureRecognizer:twoFingersRotate];

– (void)twoFingersRotate:(UIRotationGestureRecognizer *)recognizer
{
// Convert the radian value to show the degree of rotation
NSLog(@"Rotation in degrees since last change: %f", [recognizer rotation] * (180 / M_PI));
}
5.内側または外側に向かって挟むジェスチャー
コード下記：
UIPinchGestureRecognizer *twoFingerPinch =
[[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(twoFingerPinch:)] autorelease];
[[self view] addGestureRecognizer:twoFingerPinch];

– (void)twoFingerPinch:(UIPinchGestureRecognizer *)recognizer
{
NSLog(@"Pinch scale: %f", recognizer.scale);
}