下面我來給大家介紹兩種在ios開發中實現 跑馬燈滾動條效果程序代碼,有需要了解的同學可進入參考一下。

跑馬燈效果的滾動條，一般出現在ios應用的底部。用於顯示動態變化的信息或內容較長的信息，在個類應用中使用廣泛
以下兩種可用的跑馬燈滾動MarqueeBar的實現。

1.直接在ViewController中實現對UIView的位置定時移動來實現，以下代碼直接加入到ViewController中，在viewWillAppear中調用loadView即可。

 

 代碼如下 復制代碼 - (void)marqueeView
{
 
    CGRect frame = self.vMarqueeContainer.frame;
    frame.origin.x = frame.origin.x -2;
    if(frame.origin.x < -frame.size.width )
    {
        frame.origin.x  = 320;
    }
    self.vMarqueeContainer.frame = frame;
 
    //延時遞歸調用
    [self performSelector:@selector(marqueeView) withObject:nil afterDelay:0.04];
}
 
- (void)loadView
{
 //marqueenbar背景，位置高度等控制
    UIView *viewMarqueeBar = [[[UIView alloc]initWithFrame:CGRectMake(0, 347, 320, 20)]autorelease];
    [viewMarqueeBar setBackgroundColor:[UIColor darkGrayColor]];
 
    //滾動容器，顯示滾動范圍
    UIView *viewMarqueeContainer = [[[UIView alloc]initWithFrame:CGRectMake(320, 3, 360, 14)]autorelease];
    [viewMarqueeContainer setBackgroundColor:[UIColor clearColor]];
    [viewMarqueeContainer setClipsToBounds:YES];
    [viewMarqueeContainer setOpaque:YES];
 
    //內容
    UILabel *lblContent = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50,14)]autorelease];
    [lblContent setText:@"這裡是滾動條。。。。。"];
    [lblContent setTextColor:[UIColor whiteColor]];
    [lblContent setBackgroundColor:[UIColor clearColor]];
    [lblContent setFont:[UIFont fontWithName:@"Helvetica" size:12]];
    [lblContent setOpaque:YES];
 
    self.view= viewMarqueeBar;
    self.vMarqueeContainer = viewMarqueeContainer;
 
    [self.view addSubview:viewMarqueeContainer];
 
    [self marqueeView];
}

2.自行定義滾動條控件，讓view自己滾動起來，通過不斷的相互方法調用實現循環滾動
UIMarqueeBarView.h定義

 代碼如下 復制代碼

 /**
 *UIMarqueeBarView.h
 */
@interface UIMarqueeBarView : UIView
{
}
 
- (void)start;
- (void)stop;
@end

UIMarqueeBarView.m實現

/**
 *UIMarqueeBarView.m
 */
 
#import "UIMarqueeBarView.h"
 
@implementation UIMarqueeBarView
 
- (void)dealloc
{
    [super dealloc];
}
 
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
  [self setupView];
    }
    return self;
}
 
-(id)initWithCoder:(NSCoder *)aDecoder {
 if( (self = [super initWithCoder:aDecoder]) ) {
  // Initialization code
  [self setupView];
 }
 return self;
}
 
- (void)setupView
{
    [self setBackgroundColor:[UIColor lightGrayColor]];
    [self setClipsToBounds:YES];
    [self setOpaque:YES];
 
    UILabel *lblContent = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 150 ,16)]autorelease];
    [lblContent setText:@"這裡是滾動條。。。。。"];
    [lblContent setTextColor:[UIColor whiteColor]];
    [lblContent setBackgroundColor:[UIColor clearColor]];
    [lblContent setFont:[UIFont fontWithName:@"Helvetica" size:14]];
    [lblContent setNumberOfLines:1];
    [lblContent setOpaque:YES];
 
    [self addSubview:lblContent];
}
 
- (void)start
{
    if (self.viewContainer == NULL) {
        [self setupView];
    }
 
    [self startAnimation];
}
- (void)stop
{
 
}
 
-(void)startAnimation
{
    [UIView beginAnimations:@"MarqueeBarAniamation" context:nil];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    [UIView setAnimationDuration:25];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
 
    CGRect viewFrame = self.viewContainer.frame;
    viewFrame.origin.x = -320;
    [self.viewContainer setFrame:viewFrame];
 
    [UIView commitAnimations];
}
 
-(void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{ 
    CGRect viewFrame = self.viewContainer.frame;
    viewFrame.origin.x = 320;
    [self.viewContainer setFrame:viewFrame];
 [self startAnimation];
}