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微信摇一摇实现原理，视图展示
一： 实现原理
在 UIResponder中存在这么一套方法
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);
- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);
这就是执行摇一摇的方法。那么怎么用这些方法呢？
很简单，你只需要让这个Controller本身支持摇动
同时让他成为第一相应者：
- (void)viewDidLoad
{
[superviewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[[UIApplication sharedApplication] setApplicationSupportsShakeToEdit:YES];
[self becomeFirstResponder];
}
//然后去实现那几个方法就可以了
- (void) motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
//检测到摇动
}
- (void) motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
//摇动取消
}
- (void) motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
//摇动结束
if (event.subtype == UIEventSubtypeMotionShake) {
//something happens
}
}
二： 动画效果实现
// 摇动结束 调用该方法即可
- (void)addAnimations
{
AudioServicesPlaySystemSound (soundID);
//让imgup上下移动
CABasicAnimation *translation2 = [CABasicAnimation animationWithKeyPath:@"position"];
translation2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
translation2.fromValue = http://www.mamicode.com/[NSValue valueWithCGPoint:CGPointMake(160, 115)];"position"];
translation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
translation.fromValue = http://www.mamicode.com/[NSValue valueWithCGPoint:CGPointMake(160, 345+44+20)];"translation"];
[imgUp.layer addAnimation:translation2 forKey:@"translation2"];
}
微信摇一摇实现原理，视图展示
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