Question

我想在我的应用中显示一些文字，比如移动文字（从右到左滚动动画）。如何以编程方式执行此操作？

我带了UIViewcontroller。我正在开发AVAudioplayer。所以在UIViewController的顶部，文本将从右向左移动。

Answer 1

首先，您在视图中选择一个标签，并将其框架设置为视图，如下所示。

 - (void)viewDidLoad
{
    [super viewDidLoad];

    la = [[UILabel alloc]initWithFrame:CGRectMake(320, 100, 200, 60)];

    la.text = @"This is my music line";

    [self.view addSubview:la];

    [NSTimer scheduledTimerWithTimeInterval:2.0
                                     target:self
                                   selector:@selector(LabelAnimation)
                                   userInfo:nil
                                    repeats:YES];

}

现在该标签按照以下ViewDidLoad

中调用的方法提供动画

-(void)LabelAnimation
{
    [UIView animateWithDuration:3.0f delay:0.0f options:UIViewAnimationOptionTransitionNone animations:^{
        la.frame = CGRectMake(-320, 100, 200, 60);
    } completion:^(BOOL finished)
     {
         la.frame = CGRectMake(320, 100, 200, 60);
     }];

}

输出低于。

enter image description here

Answer 2

 UILabel*label=[[UILabel alloc]init];
    label.text=@"Song Name";
    label.frame=CGRectMake(321, 20, 300, 30);
    [self.view addSubview:label];
    [UIView beginAnimations:@"" context:nil];
    [UIView setAnimationDuration:20.0];
    label.frame=CGRectMake(0, 20, 300, 30);

    [UIView commitAnimations];

如果你想重复滚动文字

，你可以尝试一下

UILabel*label=[[UILabel alloc]init];
    label.text=@"Song Name";
    label.frame=CGRectMake(321, 20, 300, 30);
    [self.view addSubview:label];
    [UIView animateWithDuration:5.0 delay:0.0 options: UIViewAnimationOptionRepeat
                     animations:^{
                         label.frame=CGRectMake(-100, 20, 300, 30);
                     }completion:^(BOOL finished){
                     }];

Answer 3

//在需要的地方调用此方法。 //并在此方法中编写此4行代码

[self Message:@"test"];

- (void)Message:(NSString *)messageString
{
UILabel *label = [[UILabel alloc] initWithFrame:(CGRectMake(321, 20, 300, 30))];
label.text = messageString;
label.backgroundColor = [UIColor clearColor];
[self.view addSubview:label];
[UIView beginAnimations:@"test" context:nil];
[UIView setAnimationDuration:3];
[UIView setAnimationDidStopSelector:@selector(Message:)];
[UIView setAnimationDelegate:self];

label.frame = CGRectMake(-100, 20, 300, 30);
[UIView commitAnimations];
}

enter code here

有效..

Answer 4

你可以尝试这个

[UIView animateWithDuration:15.0f animations:^{
        Moving_Cloud.frame = CGRectMake(320.0f, 30.0f, Moving_Cloud.frame.size.width, Moving_Cloud.frame.size.height);
    }
                     completion:^(BOOL finished){
                     }];

这里＆＃34; Moving_Cloud＆＃34;是我的图像视图，所以你也可以试试你的标签。

Answer 5

哟可以使用UIView Animation阻止

 [UIView animateWithDuration:5.0f delay:0.0f options:UIViewAnimationOptionTransitionNone animations:^{
            yourLabel.center = CGPointMake(0, yourLabel.center.y);
        } completion:NULL ];

如果你想要autoreverses

之类的东西

[UIView animateWithDuration:5.0f delay:0.0f options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionBeginFromCurrentState animations:^{
            yourLabel.center = CGPointMake(0, yourLabel.center.y);
        } completion:NULL ];

Answer 6

使用以下方法

- (void)marqueeLabel:(UILabel *)label
{
    __block UILabel *labelToBeMarqueed = label;
    __block CGRect labelFrame = labelToBeMarqueed.bounds;
    labelFrame.origin.x = [UIScreen mainScreen].bounds.size.width;
    labelToBeMarqueed.frame = labelFrame;
    [UIView animateWithDuration:2.0f
                 animations:^{
                     labelFrame.origin.x = -[UIScreen mainScreen].bounds.size.width;
                     labelToBeMarqueed.frame = labelFrame;
                 } completion:^(BOOL finished) {
                     [self marqueeLabel:label];
                 }];
}

将要从右向左移动的标签传递给此方法。添加条件以停止动画，因为此方法不断循环。您可以根据需要更改动画持续时间。

Answer 7

在Swift中你可以像这样实现它

override func viewDidLoad() {
    super.viewDidLoad()

    marqueeLabel = UILabel(frame: CGRectMake(320, 100, 400, 60))
    marqueeLabel.text = "Your music title here"
    self.view.addSubview(marqueeLabel)

    UIView.animateWithDuration(10.0, delay: 0.0, options: [.Repeat], animations: { () -> Void in
        self.marqueeLabel.frame = CGRectMake(-320, 100, 400, 60)
        }, completion: { (finished: Bool) -> Void in
            self.marqueeLabel.frame = CGRectMake(320, 100, 400, 60)
    });
}

Answer 8

使用背景颜色添加视图。

UIView *animatedLblView = [[UIView alloc]initWithFrame:CGRectMake(0, 75, self.view.frame.size.width, 30)];
animatedLblView.backgroundColor = [UIColor colorWithRed:0.00 green:0.34 blue:0.61 alpha:1.0];
[self.view addSubview:animatedLblView];
//Our animated component(UIButton)
_animatingButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width+100, 30)];
[_animatingButton setTitle:@"Upload documents, please contact 1234567890" forState:UIControlStateNormal];
[animatedLblView addSubview:_animatingButton];
//Timer
[NSTimer scheduledTimerWithTimeInterval:1.0
                                 target:self
                               selector:@selector(LabelAnimation)
                               userInfo:nil
                                repeats:nil];

-(void)LabelAnimation {
    //Set animation
    [UIView animateWithDuration:10.0f delay:0.0f options:UIViewAnimationOptionTransitionNone animations:^{
    _animatingButton.frame = CGRectMake(-(self.view.frame.size.width+100), 0, self.view.frame.size.width+100, 30);
    } completion:^(BOOL finished) {
     _animatingButton.frame = CGRectMake(self.view.frame.size.width, 0, 0, 30);
        // Call the same function
        [self LabelAnimation];
     }];
}

Answer 9

对于Swift，只需运行以下功能即可：

 func startMarqueeLabelAnimation() {

    DispatchQueue.main.async(execute: {

        UIView.animate(withDuration: 20.0, delay: 1, options: ([.curveLinear, .repeat]), animations: {() -> Void in
            self.marqueeLabel.center = CGPoint(x: 0 - self.marqueeLabel.bounds.size.width / 2, y: self.marqueeLabel.center.y)

        }, completion:  nil)

    })
}

如何以编程方式在iOS中从右向左移动文本

9 个答案: