ViewController.h

1 #import 
     
       2  3 @interface ViewController : UIViewController{ 4     NSTimer           *timer; 5     UIScrollView      *scrollViewText; 6 } 7  8 @property (nonatomic ,strong) NSArray *arrData; 9 10 11 @end
     

ViewController.m

1 //  2 //  ViewController.m  3 //  跑马灯文字广告  4 //  5 //  Created by Time.X on 16/2/15.  6 //  Copyright © 2016年 Time.X. All rights reserved.  7 //  8   9 #import "ViewController.h" 10  11 #pragma mark - Class define variable 12 #define K_MAIN_VIEW_SCROLL_HEIGHT 80.0f 13 #define K_MAIN_VIEW_SCROLL_TEXT_TAG 300 14 #define K_MAIN_VIEW_TEME_INTERVAL 0.35         //计时器间隔时间(单位秒) 15 #define K_MAIN_VIEW_SCROLLER_SPACE 20          //每次移动的距离 16 #define K_MAIN_VIEW_SCROLLER_LABLE_WIDTH  280  //字体宽度 17 #define K_MAIN_VIEW_SCROLLER_LABLE_MARGIN 20   //前后间隔距离 18  19 @interface ViewController () 20  21 @end 22  23 @implementation ViewController 24  25 #pragma mark - Class property 26 @synthesize arrData; 27  28 - (void)viewDidLoad { 29     [super viewDidLoad]; 30      31     [self initView]; 32 } 33  34 - (void)didReceiveMemoryWarning { 35     [super didReceiveMemoryWarning]; 36     // Dispose of any resources that can be recreated. 37 } 38  39  40 #pragma mark - Custom method 41 //初始化数据 42 -(void) initView{ 43      44     if (!self.arrData) { 45         self.arrData = @[ 46                          @{ 47                              @"newsId"   :@"201507070942261935", 48                               @"newsImg"  :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709395519.jpg", 49                               @"newsTitle" : @"三大理由欧元任性抗跌，欧元区峰会将为希腊定调" 50                                   }, 51                          @{ 52                              @"newsId"   :@201507070929021220, 53                               @"newsImg"   :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709273545.jpg", 54                               @"newsTitle" :@"欧盟峰会或现希腊转机，黄金打响1162保卫战" 55                               }, 56                          @{ 57                              @"newsId"    :@201507070656471857, 58                               @"newsImg"   :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/2015070706533134.jpg", 59                               @"newsTitle" :@"希腊困局欧元不怕，油价服软暴跌8%" 60                               } 61                          ]; 62     } 63      64     //文字滚动 65     [self initScrollText]; 66      67     //开启滚动 68     [self startScroll]; 69 } 70  71  72 //文字滚动初始化 73 -(void) initScrollText{ 74      75     //获取滚动条 76     scrollViewText = (UIScrollView *)[self.view viewWithTag:K_MAIN_VIEW_SCROLL_TEXT_TAG]; 77     if(!scrollViewText){ 78         scrollViewText = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, K_MAIN_VIEW_SCROLL_HEIGHT)]; 79         scrollViewText.showsHorizontalScrollIndicator = NO;   //隐藏水平滚动条 80         scrollViewText.showsVerticalScrollIndicator = NO;     //隐藏垂直滚动条 81         scrollViewText.tag = K_MAIN_VIEW_SCROLL_TEXT_TAG; 82         [scrollViewText setBackgroundColor:[UIColor grayColor]]; 83          84         //清除子控件 85         for (UIView *view in [scrollViewText subviews]) { 86             [view removeFromSuperview]; 87         } 88          89         //添加到当前视图 90         [self.view addSubview:scrollViewText]; 91     } 92      93      94     if (self.arrData) { 95          96         CGFloat offsetX = 0 ,i = 0, h = 30; 97          98         //设置滚动文字 99         UILabel *labText = nil;100         for (NSDictionary *dicTemp in self.arrData) {101             labText = [[UILabel alloc] initWithFrame:CGRectMake(102                                                                 i * (K_MAIN_VIEW_SCROLLER_LABLE_WIDTH + K_MAIN_VIEW_SCROLLER_LABLE_MARGIN),103                                                                 (K_MAIN_VIEW_SCROLL_HEIGHT - h) / 2,104                                                                 K_MAIN_VIEW_SCROLLER_LABLE_WIDTH,105                                                                 h)];106             [labText setFont:[UIFont systemFontOfSize:18]];107             [labText setTextColor:[UIColor whiteColor]];108             labText.text = dicTemp[@"newsTitle"];109             offsetX += labText.frame.origin.x;110             111             //添加到滚动视图112             [scrollViewText addSubview:labText];113             114             i++;115         }116         117         //设置滚动区域大小118         [scrollViewText setContentSize:CGSizeMake(offsetX, 0)];119     }120 }121 122 123 //开始滚动124 -(void) startScroll{125     126     if (!timer)127         timer = [NSTimer scheduledTimerWithTimeInterval:K_MAIN_VIEW_TEME_INTERVAL target:self selector:@selector(setScrollText) userInfo:nil repeats:YES];128     129     [timer fire];130 }131 132 133 //滚动处理134 -(void) setScrollText{135     136     CGFloat startX = scrollViewText.contentSize.width - K_MAIN_VIEW_SCROLLER_LABLE_WIDTH - K_MAIN_VIEW_SCROLLER_LABLE_MARGIN;137     138     [UIView animateWithDuration:K_MAIN_VIEW_TEME_INTERVAL * 2 animations:^{139         CGRect rect;140         CGFloat offsetX = 0.0;141         142         for (UILabel *lab in scrollViewText.subviews) {143             144             rect = lab.frame;145             offsetX = rect.origin.x - K_MAIN_VIEW_SCROLLER_SPACE;146             if (offsetX < -K_MAIN_VIEW_SCROLLER_LABLE_WIDTH)147                 offsetX = startX;148             149             lab.frame = CGRectMake(offsetX, rect.origin.y, rect.size.width, rect.size.height);150         }151         152         NSLog(@"offsetX:%f",offsetX);153         154     }];155     156 }157 158 @end