微信聊天表情雨、表情下落、表情动画
做项目的时候突然闲了下来，然后项目里有一个留言的功能，就想着留一点彩蛋在那里，如果某个用户触发了，也是一件快乐的事。
好了，回到正题上，微信聊天 么么哒 大家应该都很熟悉，本文要介绍的彩蛋也就是那种（如下图）
代码很简单，使用方法也很简单
-(void)startEmojiAnimation
{
//需要Assets 里的 emoji，或者使用自己项目的 emoji
//先判断是否需要表情
EmojiAnimationType needAnimation = [ESEmojiAnimation needAnimationWithInput:@"么么哒"];
if (needAnimation > 0) {
//日常防止手贱党
if (_emojiAnimation) [_emojiAnimation viewDelloc];
//开始表情
_emojiAnimation = [ESEmojiAnimation startAnimationWithEmojiType:needAnimation andShowInView:self.view];
}
}
声明：
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
typedef NS_ENUM(NSUInteger,EmojiAnimationType) {
EmojiAnimationType_NO = 0, //不需要表情
EmojiAnimationType_MeMeDa = 1, //么么哒
EmojiAnimationType_Chou = 2, //丑
EmojiAnimationType_LaJi = 3, //垃圾
EmojiAnimationType_PiaoLiang = 4, //漂亮
EmojiAnimationType_HaoHaoKan = 5, //好好看
EmojiAnimationType_MaiJiaZhenHao = 6, //卖家真好/买家真好
EmojiAnimationType_XiaoJieJie = 7, //小姐姐
EmojiAnimationType_XiaoGeGe = 8, //小哥哥
EmojiAnimationType_HaHaHa = 9, //哈哈哈
EmojiAnimationType_LiuLiuLiu = 10, //666
};
@interface ESEmojiAnimation : NSObject
+(NSInteger)needAnimationWithInput:(NSString *)type;
+(ESEmojiAnimation *)startAnimationWithEmojiType:(EmojiAnimationType)type andShowInView:(id)sView;
-(void)viewDelloc;
@end
NS_ASSUME_NONNULL_END
实现：
#import "ESEmojiAnimation.h"
#import <UIKit/UIKit.h>
#define EMOJI_W 30 //表情款
#define EMOJI_H 30 //表情高
#define ANIMATION_STOP_TIME 5.f //超过这个时间，不再新增下飘表情
#define ANIMATION_REMOVE_TIME 4.f //延迟关闭定时器，等所有表情飘到屏幕外后关闭。最好根据屏幕判断一下，屏幕短的不需要那么久飘完
#define ANIMATION_CHANGE_TIME 0.2f //间隔新增下落表情
#define EMOJI_SCREEN_W ([UIScreen mainScreen].bounds.size.width) //屏幕宽，请替换为自己项目所使用的宏
#define EMOJI_SCREEN_H ([UIScreen mainScreen].bounds.size.height) //屏幕高，请替换为自己项目所使用的宏
@interface ESEmojiAnimation ()
@property (nonatomic, retain) NSTimer * timer; //定时器
@property (nonatomic, assign) CGFloat timeCount; //增量，超过时间关闭
@property (nonatomic, retain) CALayer * sLayer; //添加的llayer
@property (nonatomic, retain) UIView * bgView; //添加layer的view
@property (nonatomic, retain) NSString * imageName;//下落的表情的名称
@end
@implementation ESEmojiAnimation
+(ESEmojiAnimation *)startAnimationWithEmojiType:(EmojiAnimationType)type andShowInView:(id)sView
{
ESEmojiAnimation * emojiAnimation = [[ESEmojiAnimation alloc] init];
[emojiAnimation imageNameWithShowType:type];
emojiAnimation.bgView = sView;
emojiAnimation.timeCount = 0.f;
[emojiAnimation createView];
return emojiAnimation;
}
-(void)createView
{
[_timer invalidate];
_timer = nil;
_timer = [NSTimer scheduledTimerWithTimeInterval:ANIMATION_CHANGE_TIME target:self selector:@selector(timerStart) userInfo:nil repeats:YES];
}
-(void)timerStart
{
_timeCount += ANIMATION_CHANGE_TIME;
if (_timeCount > ANIMATION_STOP_TIME) {
if (_timeCount <= ANIMATION_STOP_TIME + ANIMATION_CHANGE_TIME) {
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(stopAnimation) object:nil];
[self performSelector:@selector(stopAnimation) withObject:nil afterDelay:ANIMATION_REMOVE_TIME];
}
return;
}
UIImageView * imagev = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, EMOJI_W, EMOJI_H)];
[imagev setUserInteractionEnabled:YES];
[imagev setImage:[UIImage imageNamed:_imageName]];
_sLayer = [[CALayer alloc] init];
_sLayer.bounds = imagev.frame;
_sLayer.anchorPoint = CGPointMake(0,0);
_sLayer.position = CGPointMake(0,-40);
_sLayer.contents = (__bridge id)[imagev.image CGImage];
[_bgView.layer addSublayer:_sLayer];
[self startAnimation];
}
-(void)startAnimation
{
CAKeyframeAnimation *moveAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
CGFloat S_XA = arc4random_uniform(EMOJI_SCREEN_W);
CGFloat S_XB = arc4random_uniform(EMOJI_SCREEN_W);
NSValue * value = [NSValue valueWithCGPoint:CGPointMake(S_XA, 10)];
NSValue * value1 = [NSValue valueWithCGPoint:CGPointMake(S_XB, EMOJI_SCREEN_H + 10)];
moveAnimation.values=@[value,value1];
moveAnimation.duration = 4;
moveAnimation.repeatCount = 1;
moveAnimation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[_sLayer addAnimation:moveAnimation forKey:@"move"];
}
-(void)stopAnimation
{
[_timer invalidate];
_timer = nil;
for (CALayer * item in _bgView.layer.sublayers){
[item removeAllAnimations];
}
}
-(void)viewDelloc
{
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(stopAnimation) object:nil];
[self stopAnimation];
}
-(void)imageNameWithShowType:(EmojiAnimationType)showType
{
switch (showType) {
case EmojiAnimationType_NO:
{}break;
case EmojiAnimationType_MeMeDa:
{_imageName = @"emoji_24";}break;
case EmojiAnimationType_Chou:
{_imageName = @"emoji_44";}break;
case EmojiAnimationType_LaJi:
{_imageName = @"emoji_33";}break;
case EmojiAnimationType_PiaoLiang:
{_imageName = @"emoji_58";}break;
case EmojiAnimationType_HaoHaoKan:
{_imageName = @"emoji_10";}break;
case EmojiAnimationType_MaiJiaZhenHao:
{_imageName = @"emoji_16";}break;
case EmojiAnimationType_XiaoJieJie:
{_imageName = @"emoji_59";}break;
case EmojiAnimationType_XiaoGeGe:
{_imageName = @"emoji_74";}break;
case EmojiAnimationType_HaHaHa:
{_imageName = @"emoji_38";}break;
case EmojiAnimationType_LiuLiuLiu:
{_imageName = @"emoji_57";}break;
default:
break;
}
}
+(NSInteger)needAnimationWithInput:(NSString *)type
{
if ([type rangeOfString:@"么么哒"].location != NSNotFound) {
return EmojiAnimationType_MeMeDa;
}
if ([type rangeOfString:@"丑"].location != NSNotFound) {
return EmojiAnimationType_Chou;
}
if ([type rangeOfString:@"垃圾"].location != NSNotFound) {
return EmojiAnimationType_LaJi;
}
if ([type rangeOfString:@"漂亮"].location != NSNotFound) {
return EmojiAnimationType_PiaoLiang;
}
if ([type rangeOfString:@"好好看"].location != NSNotFound) {
return EmojiAnimationType_HaoHaoKan;
}
if ([type rangeOfString:@"卖家真好"].location != NSNotFound) {
return EmojiAnimationType_MaiJiaZhenHao;
}
if ([type rangeOfString:@"小姐姐"].location != NSNotFound) {
return EmojiAnimationType_XiaoJieJie;
}
if ([type rangeOfString:@"小哥哥"].location != NSNotFound) {
return EmojiAnimationType_XiaoGeGe;
}
if ([type rangeOfString:@"哈哈哈"].location != NSNotFound) {
return EmojiAnimationType_HaHaHa;
}
if ([type rangeOfString:@"666"].location != NSNotFound || [type rangeOfString:@"233"].location != NSNotFound) {
return EmojiAnimationType_LiuLiuLiu;
}
return EmojiAnimationType_NO;
}
@end
最后附上地址，具体大家github见
GitHub地址：https://github.com/hweibo/EmojiAnimation
QQ20181005-142247.gif
