/*初始化*/
-(instancetype)initWithFrame:(CGRect)frame textArray:(NSArray *)textArray colorArray:(NSArray *)textColorArray;

//滾動(dòng)字幕數(shù)組
@property(nonatomic,strong) NSArray<NSString *> *textArray;

//字幕顏色數(shù)組
@property(nonatomic,strong) NSArray<UIColor *> *textColorArray;

//字幕背景顏色
@property(nonatomic,strong) UIColor *backgroundColorOfCanvas;

//標(biāo)簽背景圖片
@property(nonatomic,strong) UIImage *backgroundImageOfCanvas;

//字體大小
@property(nonatomic,assign) CGFloat fontOfSize;

//定時(shí)器
@property(nonatomic,strong) NSTimer *timer;

#pragma mark - 創(chuàng)建scrollView內(nèi)容
-(void)createContentOfScrollView{

 //創(chuàng)建contentView
 self.contentSize=CGSizeMake(0, self.bounds.size.height);

 //偏移量初值設(shè)為0
 self.contentOffset=CGPointMake(0, 0);

 //關(guān)閉指示條
 self.showsHorizontalScrollIndicator=NO;

 //創(chuàng)建label

 CGFloat labelY=0;
 CGFloat labelW=200;
 CGFloat labelH=self.bounds.size.height;

 //添加兩次一樣的內(nèi)容，無限循環(huán)使用
 for (int j=0; j<2;j++ ) {

 for (int i=0; i<self.textArray.count; i++) {

 UILabel *textLabel=[[UILabel alloc] initWithFrame:CGRectMake(self.contentSize.width, labelY, labelW, labelH)];

 //******標(biāo)簽背景******
 UIImageView *labelBackGroundView=[[UIImageView alloc] initWithFrame:textLabel.frame];

 //標(biāo)簽背景圖片
 labelBackGroundView.image=self.backgroundImageOfCanvas;

 //*****label文字******
 if (i<self.textArray.count) {
  textLabel.text=self.textArray[i];
 }else{
  textLabel.text=@"----";
 }

 //label文字顏色(判斷文字顏色數(shù)組是否存有對(duì)應(yīng)的顏色，沒有則使用默認(rèn)顏色)
 if (i<self.textColorArray.count) {
  textLabel.textColor=self.textColorArray[i];
 }else{
  //默認(rèn)顏色
  textLabel.textColor=[UIColor blackColor];
 }

 //******字體大小********
 textLabel.font=[UIFont systemFontOfSize:self.fontOfSize];

 //label標(biāo)簽tag值
 textLabel.tag=LABEL_TAG_INIT + i + 100 * j;

 //每創(chuàng)建一個(gè)label在contenSize上加上一個(gè)label的寬度
 self.contentSize=CGSizeMake(self.contentSize.width+labelW, self.bounds.size.height);

 [self addSubview:labelBackGroundView];
 [self addSubview:textLabel];

 }
 }

}

 //立即啟動(dòng)定時(shí)器
 [timer setFireDate:[NSDate date]];

//暫停定時(shí)器
 [timer setFireDate:[NSDate distantFuture]];

//************自動(dòng)滾動(dòng)timer************
 NSTimer *timer=[NSTimer scheduledTimerWithTimeInterval:SCROLL_TIME_INTERVAL target:self selector:@selector(autoScroll) userInfo:nil repeats:YES];

 [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];

 //立即啟動(dòng)定時(shí)器
 [timer setFireDate:[NSDate date]];

 self.timer=timer;

//滾動(dòng)時(shí)間間隔
#define SCROLL_TIME_INTERVAL 3

//每次滾動(dòng)距離
#define SCROLL_DISTANCE 100

//自動(dòng)滾動(dòng)
- (void)autoScroll{

 //滾動(dòng)速度
 CGFloat offSet=SCROLL_DISTANCE;

 //若果字幕滾動(dòng)到第二部分重復(fù)的部分則把偏移置0，設(shè)為第一部分,實(shí)現(xiàn)無限循環(huán)
 if (self.contentOffset.x>=self.contentSize.width / 2) {

 self.contentOffset=CGPointMake(0, 0);
 }

 //切割每次動(dòng)畫滾動(dòng)距離

 [UIView animateWithDuration:SCROLL_TIME_INTERVAL delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
  self.contentOffset=CGPointMake(self.contentOffset.x+offSet, self.contentOffset.y);
 } completion:nil];
}