#import <UIKit/UIKit.h> @interface ViewController : UIViewController{  NSTimer      *timer;  UIScrollView   *scrollViewText;} @property (nonatomic ,strong) NSArray *arrData; @end

//// ViewController.m// 滾動//#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        //計時器間隔時間(單位秒)#define K_MAIN_VIEW_SCROLLER_SPACE 20.0f       //每次移動的距離#define K_MAIN_VIEW_SCROLLER_LABLE_WIDTH   18.0f  //單個字符寬度(與你設置的字體大小一致)#define K_MAIN_VIEW_SCROLLER_LABLE_MARGIN  20.0f  //前后間隔距離#define K_MAIN_VIEW_SCROLLER_SLEEP_INTERVAL 1    //停留時間  @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//初始化數據-(void) initView{   if (!self.arrData) {    self.arrData = @[             @{               @"newsId"  :@"201507070942261935",               @"newsImg" :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709395519.jpg",               @"newsTitle":@"三大理由歐元任性抗跌，歐元區峰會將為希臘定調"             },             @{               @"newsId"  :@"201507070929021220",               @"newsImg"  :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709273545.jpg",               @"newsTitle" :@"歐盟峰會或現希臘轉機，黃金打響1162保衛戰"             },             @{               @"newsId"  :@"201507070656471857",               @"newsImg"  :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/2015070706533134.jpg",               @"newsTitle" :@"希臘困局歐元不怕，油價服軟暴跌8%"             }           ];  }   //文字滾動  [self initScrollText];   //開啟滾動  [self startScroll]; }  //文字滾動初始化-(void) initScrollText{   //獲取滾動條  scrollViewText = (UIScrollView *)[self.view viewWithTag:K_MAIN_VIEW_SCROLL_TEXT_TAG];  if(!scrollViewText){    scrollViewText = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 80, self.view.frame.size.width, K_MAIN_VIEW_SCROLL_HEIGHT)];    scrollViewText.showsHorizontalScrollIndicator = NO;  //隱藏水平滾動條    scrollViewText.showsVerticalScrollIndicator = NO;   //隱藏垂直滾動條    scrollViewText.scrollEnabled = NO;          //禁用手動滑動     //橫豎屏自適應    scrollViewText.autoresizingMask = UIViewAutoresizingFlexibleWidth;    scrollViewText.tag = K_MAIN_VIEW_SCROLL_TEXT_TAG;    [scrollViewText setBackgroundColor:[UIColor grayColor]];     //給滾動視圖添加事件    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrollerViewClick:)];    [scrollViewText addGestureRecognizer:tapGesture];     //添加到當前視圖    [self.view addSubview:scrollViewText];  }else{    //清除子控件    for (UIView *view in [scrollViewText subviews]) {      [view removeFromSuperview];    }  }   if (self.arrData) {     CGFloat offsetX = 0 ,i = 0, h = 30;     //設置滾動文字    UIButton *btnText = nil;    NSString *strTitle = [[NSString alloc] init];     for (NSDictionary *dicTemp in self.arrData) {       strTitle = dicTemp[@"newsTitle"];       btnText = [UIButton buttonWithType:UIButtonTypeCustom];      [btnText setFrame:CGRectMake([self getTitleLeft:i],                     (K_MAIN_VIEW_SCROLL_HEIGHT - h) / 2,                     strTitle.length * K_MAIN_VIEW_SCROLLER_LABLE_WIDTH,                     h)];       [btnText setTitleColor:[UIColor redColor] forState:UIControlStateNormal];      [btnText setTitle:strTitle forState:UIControlStateNormal];       //橫豎屏自適應      btnText.autoresizingMask = UIViewAutoresizingFlexibleWidth;      offsetX += btnText.frame.origin.x;       //設置為 NO,否則無法響應點擊事件      btnText.userInteractionEnabled = NO;       //添加到滾動視圖      [scrollViewText addSubview:btnText];       i++;    }     //設置滾動區域大小    [scrollViewText setContentSize:CGSizeMake(offsetX, 0)];  }}  #pragma mark - 滾動處理//開始滾動-(void) startScroll{   if (!timer)    timer = [NSTimer scheduledTimerWithTimeInterval:K_MAIN_VIEW_TEME_INTERVAL target:self selector:@selector(setScrollText) userInfo:nil repeats:YES];   [timer fire]; }  //滾動處理-(void) setScrollText{   [UIView animateWithDuration:K_MAIN_VIEW_TEME_INTERVAL * 2 animations:^{    CGRect rect;    CGFloat offsetX = 0.0,width = 0.0;     for (UIButton *btnText in scrollViewText.subviews) {       rect = btnText.frame;      offsetX = rect.origin.x - K_MAIN_VIEW_SCROLLER_SPACE;      width = [btnText.titleLabel.text length] * K_MAIN_VIEW_SCROLLER_LABLE_WIDTH;       btnText.frame = CGRectMake(offsetX, rect.origin.y, rect.size.width, rect.size.height);       NSLog(@"offsetX:%f",offsetX);    }     if (offsetX < -width){      [UIView setAnimationsEnabled:NO];      [self initScrollText];    }else      [UIView setAnimationsEnabled:YES];  }]; }  #pragma mark - 動態獲取左邊位置-(float) getTitleLeft:(CGFloat) i {  float left = i * K_MAIN_VIEW_SCROLLER_LABLE_MARGIN;   if (i > 0) {    for (int j = 0; j < i; j ++) {      left += [[self.arrData objectAtIndex:j][@"newsTitle"] length] * K_MAIN_VIEW_SCROLLER_LABLE_WIDTH;    }  }   return left;}  #pragma mark - 新聞點擊事件-(void)btnNewsClick:(UIButton *) sender{   NSString *strNewsTitle = sender.titleLabel.text;   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"系統提示"                          message:strNewsTitle                          delegate:sender                     cancelButtonTitle:@"確定"                     otherButtonTitles:@"其他", nil];  [alert show]; } -(void)scrollerViewClick:(UITapGestureRecognizer*)gesture{   CGPoint touchPoint = [gesture locationInView:scrollViewText];   for (UIButton *btn in scrollViewText.subviews) {     if ([btn.layer.presentationLayer hitTest:touchPoint]) {      [self btnNewsClick:btn];      break;    }   } } @end