viewcontroller.h
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#import <uikit/uikit.h> @interface viewcontroller : uiviewcontroller{ nstimer *timer; uiscrollview *scrollviewtext;} @property (nonatomic ,strong) nsarray *arrdata; @end |
viewcontroller.m
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//// viewcontroller.m// 滚动//#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 20.0f //每次移动的距离#define k_main_view_scroller_lable_width 18.0f //单个字符宽度(与你设置的字体大小一致)#define k_main_view_scroller_lable_margin 20.0f //前后间隔距离#define k_main_view_scroller_sleep_interval 1 //停留时间 @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" :@"201507070942261935", @"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" :@"201507070929021220", @"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" :@"201507070656471857", @"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(0, 80, 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.scrollenabled = no; //禁用手动滑动 //横竖屏自适应 scrollviewtext.autoresizingmask = uiviewautoresizingflexiblewidth; scrollviewtext.tag = k_main_view_scroll_text_tag; [scrollviewtext setbackgroundcolor:[uicolor graycolor]]; //给滚动视图添加事件 uitapgesturerecognizer *tapgesture = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(scrollerviewclick:)]; [scrollviewtext addgesturerecognizer:tapgesture]; //添加到当前视图 [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; //设置滚动文字 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]; //横竖屏自适应 btntext.autoresizingmask = uiviewautoresizingflexiblewidth; offsetx += btntext.frame.origin.x; //设置为 no,否则无法响应点击事件 btntext.userinteractionenabled = no; //添加到滚动视图 [scrollviewtext addsubview:btntext]; i++; } //设置滚动区域大小 [scrollviewtext setcontentsize:cgsizemake(offsetx, 0)]; }} #pragma mark - 滚动处理//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{ [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 - 动态获取左边位置-(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 - 新闻点击事件-(void)btnnewsclick:(uibutton *) sender{ nsstring *strnewstitle = sender.titlelabel.text; uialertview *alert = [[uialertview alloc] initwithtitle:@"系统提示" message:strnewstitle delegate:sender cancelbuttontitle:@"确定" 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 |
示例源码下载：文字水平无间断滚动效果
备注：该开发工具xcode 版本为 6.4,如无法直接运行，可新建项目将以上文件复制替换即可
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/yimiyuangguang/article/details/46801803
