#import <UIKit/UIKit.h>

 @interface ViewController : UIViewController{

     NSTimer           *timer;

     UIScrollView      *scrollViewText;

 }

 @property (nonatomic ,strong) NSArray *arrData;

 @end

 //

 //  ViewController.m

 //  跑马灯文字广告

 //

 //  Created by Time.X on 16/2/15.

 //  Copyright © 2016年 Time.X. All rights reserved.

 //

 #import "ViewController.h"

 #pragma mark - Class define variable

 #define K_MAIN_VIEW_SCROLL_HEIGHT 80.0f

 #define K_MAIN_VIEW_SCROLL_TEXT_TAG 300

 #define K_MAIN_VIEW_TEME_INTERVAL 0.35         //计时器间隔时间(单位秒)

 #define K_MAIN_VIEW_SCROLLER_SPACE 20          //每次移动的距离

 #define K_MAIN_VIEW_SCROLLER_LABLE_WIDTH  280  //字体宽度

 #define K_MAIN_VIEW_SCROLLER_LABLE_MARGIN 20   //前后间隔距离

 @interface ViewController ()

 @end

 @implementation ViewController

 #pragma mark - Class property

 @synthesize arrData;

 - (void)viewDidLoad {

     [super viewDidLoad];

     [self initView];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 #pragma mark - Custom method

 //初始化数据

 -(void) initView{

     if (!self.arrData) {

         self.arrData = @[

                          @{

                              @"newsId"   :@"",

                               @"newsImg"  :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709395519.jpg",

                               @"newsTitle" : @"三大理由欧元任性抗跌，欧元区峰会将为希腊定调"

                                   },

                          @{

                              @"newsId"   :@,

                               @"newsImg"   :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709273545.jpg",

                               @"newsTitle" :@"欧盟峰会或现希腊转机，黄金打响1162保卫战"

                               },

                          @{

                              @"newsId"    :@,

                               @"newsImg"   :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/2015070706533134.jpg",

                               @"newsTitle" :@"希腊困局欧元不怕，油价服软暴跌8%"

                               }

                          ];

     }

     //文字滚动

     [self initScrollText];

     //开启滚动

     [self startScroll];

 }

 //文字滚动初始化

 -(void) initScrollText{

     //获取滚动条

     scrollViewText = (UIScrollView *)[self.view viewWithTag:K_MAIN_VIEW_SCROLL_TEXT_TAG];

     if(!scrollViewText){

         scrollViewText = [[UIScrollView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, K_MAIN_VIEW_SCROLL_HEIGHT)];

         scrollViewText.showsHorizontalScrollIndicator = NO;   //隐藏水平滚动条

         scrollViewText.showsVerticalScrollIndicator = NO;     //隐藏垂直滚动条

         scrollViewText.tag = K_MAIN_VIEW_SCROLL_TEXT_TAG;

         [scrollViewText setBackgroundColor:[UIColor grayColor]];

         //清除子控件

         for (UIView *view in [scrollViewText subviews]) {

             [view removeFromSuperview];

         }

         //添加到当前视图

         [self.view addSubview:scrollViewText];

     }

     if (self.arrData) {

         CGFloat offsetX =  ,i = , h = ;

         //设置滚动文字

         UILabel *labText = nil;

         for (NSDictionary *dicTemp in self.arrData) {

             labText = [[UILabel alloc] initWithFrame:CGRectMake(

                                                                 i * (K_MAIN_VIEW_SCROLLER_LABLE_WIDTH + K_MAIN_VIEW_SCROLLER_LABLE_MARGIN),

                                                                 (K_MAIN_VIEW_SCROLL_HEIGHT - h) / ,

                                                                 K_MAIN_VIEW_SCROLLER_LABLE_WIDTH,

                                                                 h)];

             [labText setFont:[UIFont systemFontOfSize:]];

             [labText setTextColor:[UIColor whiteColor]];

             labText.text = dicTemp[@"newsTitle"];

             offsetX += labText.frame.origin.x;

             //添加到滚动视图

             [scrollViewText addSubview:labText];

             i++;

         }

         //设置滚动区域大小

         [scrollViewText setContentSize:CGSizeMake(offsetX, )];

     }

 }

 //开始滚动

 -(void) startScroll{

     if (!timer)

         timer = [NSTimer scheduledTimerWithTimeInterval:K_MAIN_VIEW_TEME_INTERVAL target:self selector:@selector(setScrollText) userInfo:nil repeats:YES];

     [timer fire];

 }

 //滚动处理

 -(void) setScrollText{

     CGFloat startX = scrollViewText.contentSize.width - K_MAIN_VIEW_SCROLLER_LABLE_WIDTH - K_MAIN_VIEW_SCROLLER_LABLE_MARGIN;

     [UIView animateWithDuration:K_MAIN_VIEW_TEME_INTERVAL *  animations:^{

         CGRect rect;

         CGFloat offsetX = 0.0;

         for (UILabel *lab in scrollViewText.subviews) {

             rect = lab.frame;

             offsetX = rect.origin.x - K_MAIN_VIEW_SCROLLER_SPACE;

             if (offsetX < -K_MAIN_VIEW_SCROLLER_LABLE_WIDTH)

                 offsetX = startX;

             lab.frame = CGRectMake(offsetX, rect.origin.y, rect.size.width, rect.size.height);

         }

         NSLog(@"offsetX:%f",offsetX);

     }];

 }

 @end