viewcontroller.h
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#import <uikit/uikit.h>
@interface viewcontroller : uiviewcontroller{
nstimer *timer;
uiscrollview *scrollviewtext;
}
@property (nonatomic ,strong) nsarray *arrdata;
@end
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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
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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