代码详解iOS视频直播弹幕功能

最后在vc里面

#import "ViewController.h"
#import "BarrageView.h"
#import "BarrageModel.h"
//屏幕的尺寸
#define SCREEN_FRAME [[UIScreen mainScreen] bounds]
//屏幕的高度
#define SCREEN_HEIGHT CGRectGetHeight(SCREEN_FRAME)
//屏幕的宽度
#define SCREEN_WIDTH CGRectGetWidth(SCREEN_FRAME)
@interface ViewController ()
/** 第一个弹幕轨道 */
@property (nonatomic,retain)BarrageView *barrageViewOne;
/** 第二个弹幕轨道 */
@property (nonatomic,retain)BarrageView *barrageViewTwo;
@end
@implementation ViewController
- (void)viewDidLoad {
 [super viewDidLoad];
 //创建第一个弹幕轨道
 _barrageViewOne = [[BarrageView alloc]initWithFrame:CGRectMake(0,200, SCREEN_WIDTH, 34)];
 [self.view addSubview:_barrageViewOne];
 //创建第二个弹幕轨道
 _barrageViewTwo = [[BarrageView alloc]initWithFrame:CGRectMake(0,300, SCREEN_WIDTH, 34)];
 [self.view addSubview:_barrageViewTwo];
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
 NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(sendMessage) userInfo:nil repeats:YES];
 [timer fire];
}
-(void)sendMessage
{
 BarrageModel *model = [[BarrageModel alloc]init];
 model.userName = @[@"张三",@"李四",@"王五",@"赵六",@"七七",@"八八",@"九九",@"十十",@"十一",@"十二",@"十三",@"十四"][arc4random()%12];
 model.userMsg = @[@"阿达个人",@"都是vsqe12qwe",@"胜多负少的凡人歌",@"委屈翁二群二",@"12312",@"热帖柔荑花",@"发彼此彼此",@"OK泼墨",@"人体有图图",@"额外热无若无",@"微软将围"][arc4random()%11];
 //计算当前做动画的弹幕UI的位置
 CGFloat onePositon = _barrageViewOne.lastAnimateView.layer.presentationLayer.frame.size.width + _barrageViewOne.lastAnimateView.layer.presentationLayer.frame.origin.x;
 //计算当前做动画的弹幕UI的位置
 CGFloat twoPositon = _barrageViewTwo.lastAnimateView.layer.presentationLayer.frame.size.width + _barrageViewTwo.lastAnimateView.layer.presentationLayer.frame.origin.x;
 if ( onePositon < twoPositon ) {
 [_barrageViewOne barrageSendMsg:model];
 }else{
 [_barrageViewTwo barrageSendMsg:model];
 }
}
@end