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我想让用户触摸屏幕,我把这些触摸的大小和位置,并为他提供一个图像“好像它”是他的指纹,但与几乎相同的形状和他的手指我需要模仿手指触摸,绘制触摸的印记
我实现了的touchesBegan功能与touchesMoves功能如下的大小(两者都具有相同的码)
,因为它是所示的touchSize下面是实际的用户触摸到的尺寸屏幕和它保存的触摸半径,然后我创建了一个使用SKshapeNode和颜色的圆形形状,并将其显示在屏幕上
点它的颜色在这里我感动,但是当我移动触摸规模开始变大,我不能让它吸取手指
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins*/
for (UITouch *touch in touches) {
CGPoint location = [touch locationInNode:self];
CGFloat touchSize = [[touch valueForKey:@"pathMajorRadius"] floatValue];
SKShapeNode *touchedLocation = [SKShapeNode shapeNodeWithCircleOfRadius:touchSize/4];
touchedLocation.fillColor = [SKColor whiteColor];
touchedLocation.position = location;
[self addChild:touchedLocation];
}
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
for (UITouch *touch in touches) {
CGPoint location = [touch locationInNode:self];
CGFloat touchSize = [[touch valueForKey:@"pathMajorRadius"] floatValue];
isScreenTouched = YES;
SKShapeNode *touchedLocation = [SKShapeNode shapeNodeWithCircleOfRadius:touchSize/4];
touchedLocation.fillColor = [SKColor whiteColor];
touchedLocation.position = location;
touchedLocation.name = @"AnamelPrint";
[self addChild:touchedLocation];
}
}
小混乱......如果你只是想要一个手指的印记,为什么你使用touchesMoved? – sangony
嗯,我是iOS的初学者。我使用了touchesMoved,因为当我只使用touchesBegan时,它显示出一个小圆形并且我希望它是手指的形状 – Sara
您意识到屏幕实际上不能“读取”指纹。我建议你拍一张指纹图像并放置在触摸位置,以模拟你正在尝试做什么。 – sangony