iOS 实现红包雨
先扯一点其他的东西。苹果爸爸永远是你爸爸。公司的APP上周被苹果审核拒绝了，条款是5.2.1。原文在这里。
The seller and company names associated with your app do not reflect the name of the health insurance provider in the app or its metadata, as required by Guideline 5.2.1 of the App Store Review Guidelines.
Next Steps
Your app must be published under a seller name and company name that reflects the health insurance provider name. If you have developed this app on behalf of a client, please advise your client to add you to the development team of their Apple Developer account. If your client does not yet have an Apple Developer account, they can enroll in the Apple Developer Program through the Apple Developer portal.
Note that submitting documentation showing permission to publish this app on behalf of the content owner or institution will not resolve this issue. This app must be submitted under the content owner’s own Apple Developer account.
To request a fee waiver for nonprofit organizations, accredited educational institutions, or U.S.-based government entities, follow the steps outlined on the Apple Developer Program Membership Fee Waivers page.
Once created, you cannot change your seller name or company name in iTunes Connect. For assistance with changing your company name or seller name, you will need to contact iTunes Connect through the Contact Us page. Select Getting Started from the first dropdown menu, then select General iTunes Connect Inquiry to contact the appropriate iTunes Connect team.
最开始公司的开发账号是个人级别账号，APP是金融保险类。个人账号不能发布金融相关的APP，所以用科技信息公司的名义申请了公司级别的账号。但是在上周提交APP的时候，却被没有金融保险资质的理由给打了回来。现在要以保险经纪公司的名义（有保险专业代理许可证 ）去申请新的账号，下午打电话咨询苹果，苹果表示现在申请邓白氏编码需要5到7个工作日（以前需要14个工作日），然后苹果还需要2个工作日，才能将邓白氏编码的信息同步到数据库。还有申请账号和提交审核新的APP都需要时间。要是放在平时没有什么关系，但是年前原生开发最后一个版本，有个重要的功能是要实现红包雨。这个时间和风险都担不起，iOS是发不了版本了，所以上面最终决定用H5开发红包雨功能。
但是iOS已经将功能开发的差不多了，参考文章iOS红包雨实现总结。虽然没有什么技术难点，动画平时用的非常少，还是把它记录下来。先来看看效果。
redPacket.gif
由两个部分组成，第一部分是张图片和一个倒计时。一会还有一个定时器下落红包，用不同的方式实现。
- (void)startTime
{
__block int timeout = 5;
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue);
dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0);
dispatch_source_set_event_handler(_timer, ^{
if ( timeout <= 0 )
{
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
[self startRedPackerts];
});
}
else
{
NSString * titleStr = [NSString stringWithFormat:@"%d",timeout];
dispatch_async(dispatch_get_main_queue(), ^{
self.countdownLab.text = titleStr;
});
timeout--;
}
});
dispatch_resume(_timer);
}
倒计时结束后就开始下红包雨，红包雨的动画用CALayer来实现。红包CALayer的contents设置为红包的图片就行。1秒钟下落4个红包，动画分为两个部分，第一个部分是位移动画，第二部分是旋转动画。
- (void)startRedPackerts
{
[self touchView];
self.timer = [NSTimer scheduledTimerWithTimeInterval:(1/4.0) target:self selector:@selector(showRain) userInfo:nil repeats:YES];
[self.timer invalidate];
}
- (void)showRain
{
UIImageView * imageV = [UIImageView new];
imageV.image = [UIImage imageNamed:@"rp_normal"];
imageV.frame = CGRectMake(0, 0, 44 , 62.5 );
self.moveLayer = [CALayer new];
self.moveLayer.bounds = imageV.frame;
self.moveLayer.anchorPoint = CGPointMake(0, 0);
self.moveLayer.position = CGPointMake(0, -62.5 );
self.moveLayer.contents = (id)imageV.image.CGImage;
[self.touchView.layer addSublayer:self.moveLayer];
[self addAnimation];
}
- (void)addAnimation
{
CAKeyframeAnimation * moveAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
NSValue * A = [NSValue valueWithCGPoint:CGPointMake(arc4random() % 414, 0)];
NSValue * B = [NSValue valueWithCGPoint:CGPointMake(arc4random() % 414, SCREEN_HEIGHT)];
moveAnimation.values = @[A,B];
moveAnimation.duration = arc4random() % 200 / 100.0 + 3.5;
moveAnimation.repeatCount = 1;
moveAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[self.moveLayer addAnimation:moveAnimation forKey:nil];
CAKeyframeAnimation * tranAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
CATransform3D r0 = CATransform3DMakeRotation(M_PI/180 * (arc4random() % 360 ) , 0, 0, -1);
CATransform3D r1 = CATransform3DMakeRotation(M_PI/180 * (arc4random() % 360 ) , 0, 0, -1);
tranAnimation.values = @[[NSValue valueWithCATransform3D:r0],[NSValue valueWithCATransform3D:r1]];
tranAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
tranAnimation.duration = arc4random() % 200 / 100.0 + 3.5;
//为了避免旋转动画完成后再次回到初始状态。
[tranAnimation setFillMode:kCAFillModeForwards];
[tranAnimation setRemovedOnCompletion:NO];
[self.moveLayer addAnimation:tranAnimation forKey:nil];
}
红包下落完成后，关闭倒计时，移除layer动画
- (void)endAnimation
{
[self.timer invalidate];
for (NSInteger i = 0; i < self.touchView.layer.sublayers.count ; i ++)
{
CALayer * layer = self.touchView.layer.sublayers[i];
[layer removeAllAnimations];
}
}
然后再看看红包的点击事件。UIView可以响应事件,但是CALayer不行。可以给背景视图添加手势，然后根据手势的落点，来判断是第几个红包。后台接口控制哪个红包的类型，根据类型再展示不同的效果，后面的代码根据不同的业务场景在来实现。
- (void)clickRed:(UITapGestureRecognizer *)sender
{
CGPoint point = [sender locationInView:self.touchView];
for (int i = 0 ; i < self.touchView.layer.sublayers.count ; i ++)
{
CALayer * layer = self.touchView.layer.sublayers[i];
if ([[layer presentationLayer] hitTest:point] != nil)
{
NSLog(@"%d",i);
BOOL hasRedPacketd = !(i % 3) ;
UIImageView * newPacketIV = [UIImageView new];
if (hasRedPacketd)
{
newPacketIV.image = [UIImage imageNamed:@"rp_yes"];
newPacketIV.frame = CGRectMake(0, 0, 63.5, 74);
}
else
{
newPacketIV.image = [UIImage imageNamed:@"rp_no"];
newPacketIV.frame = CGRectMake(0, 0, 45.5, 76.5);
}
layer.contents = (id)newPacketIV.image.CGImage;
UIView * alertView = [UIView new];
alertView.layer.cornerRadius = 5;
alertView.frame = CGRectMake(point.x - 50, point.y, 100, 30);
[self.touchView addSubview:alertView];
UILabel * label = [UILabel new];
label.font = [UIFont systemFontOfSize:17];
if (!hasRedPacketd)
{
label.text = @"旺旺年！人旺旺";
label.textColor = [UIColor whiteColor];
}
else
{
NSString * string = [NSString stringWithFormat:@"+%d金币",i];
NSString * iString = [NSString stringWithFormat:@"%d",i];
NSMutableAttributedString * attributedStr = [[NSMutableAttributedString alloc]initWithString:string];
[attributedStr addAttribute:NSFontAttributeName
value:[UIFont systemFontOfSize:27]
range:NSMakeRange(0, 1)];
[attributedStr addAttribute:NSFontAttributeName
value:[UIFont fontWithName:@"PingFangTC-Semibold" size:32]
range:NSMakeRange(1, iString.length)];
[attributedStr addAttribute:NSFontAttributeName
value:[UIFont systemFontOfSize:17]
range:NSMakeRange(1 + iString.length, 2)];
label.attributedText = attributedStr;
label.textColor = RGBA(255,223,14, 1);
}
[alertView addSubview:label];
[label mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerX.equalTo(alertView.mas_centerX);
make.centerY.equalTo(alertView.mas_centerY);
}];
[UIView animateWithDuration:1 animations:^{
alertView.alpha = 0;
alertView.frame = CGRectMake(point.x- 50, point.y - 100, 100, 30);
} completion:^(BOOL finished) {
[alertView removeFromSuperview];
}];
}
}
}
