iOS中怎么實(shí)現(xiàn)文字水平無間斷滾動效果-創(chuàng)新互聯(lián)

iOS中怎么實(shí)現(xiàn)文字水平無間斷滾動效果，很多新手對此不是很清楚，為了幫助大家解決這個(gè)難題，下面小編將為大家詳細(xì)講解，有這方面需求的人可以來學(xué)習(xí)下，希望你能有所收獲。

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ViewController.h

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

ViewController.m

//// 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(jì)時(shí)器間隔時(shí)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(gè)字符寬度(與你設(shè)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(shí)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(shù)據(jù)-(void) initView{ if (!self.arrData) { self.arrData = @[ @{ @"newsId" :@"201507070942261935", @"newsImg" :@"/tupian/20230522/404.html @"newsTitle":@"三大理由歐元任性抗跌，歐元區(qū)峰會將為希臘定調(diào)" }, @{ @"newsId" :@"201507070929021220", @"newsImg" :@"/tupian/20230522/404.html @"newsTitle" :@"歐盟峰會或現(xiàn)希臘轉(zhuǎn)機(jī)，黃金打響1162保衛(wèi)戰(zhàn)" }, @{ @"newsId" :@"201507070656471857", @"newsImg" :@"/tupian/20230522/404.html @"newsTitle" :@"希臘困局歐元不怕，油價(jià)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(yīng) 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(dāng)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(shè)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(yīng) btnText.autoresizingMask = UIViewAutoresizingFlexibleWidth; offsetX += btnText.frame.origin.x; //設(shè)置為 NO,否則無法響應(yīng)點(diǎn)擊事件 btnText.userInteractionEnabled = NO; //添加到滾動視圖 [scrollViewText addSubview:btnText]; i++; } //設(shè)置滾動區(qū)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(tài)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(diǎn)擊事件-(void)btnNewsClick:(UIButton *) sender{ NSString *strNewsTitle = sender.titleLabel.text; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"系統(tǒng)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

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