iOS 跑马灯

前言
花里胡哨的UI，设计了花里胡哨的界面，然后我们苦逼的程序员就要去实现。

跑马灯效果有N多种实现，有通过动画实现的，有通过NSTimer实现的，我用的方法是NSTimer。

原理：
如下图，view显示信息的界面，label1和label2分别是要展示的内容，当label1离开屏幕是放到label2后面。如此反复。

-(void)createSubViews{
    
    self.layer.masksToBounds = YES;
    
    
    [self.viewsArr removeAllObjects];
    CGFloat h = self.frame.size.height;
    if (self.textArr.count == 1) {
        NSString *text = self.textArr.firstObject;
        CGFloat w = [self getElementWidthWithText:text];
        self.label1.frame = CGRectMake(0, 0, w, h);
        self.label1.text = text;
        
        
        self.label2.frame = CGRectMake(w, 0, w, h);
        self.label2.text = text;
        
        self.label1.tag = self.label1.tag = 0;
        
        [self.viewsArr addObject:self.label1];
        [self.viewsArr addObject:self.label2];
    }else if (self.textArr.count > 1){
        CGFloat w1 = 0;
        CGFloat w2 = 0;
        for (int i = 0; i<self.textArr.count; i++) {
            w1 = [self getElementWidthWithText:self.textArr[I]];
            UILabel *lab = [[UILabel alloc] init];
            lab.frame = CGRectMake(w2, 0, w1, h);
            lab.text = self.textArr[I];
            lab.tag = I;
            [self.viewsArr addObject:lab];
            w2 = w1;
        }
        
        UILabel *lab = self.viewsArr.firstObject;
        self.label1.frame = lab.frame;
        self.label1.text = lab.text;
        self.label1.tag = lab.tag;
        
        UILabel *lab2 = self.viewsArr[1];
        self.label2.frame = lab2.frame;
        self.label2.text = lab2.text;
        self.label2.tag = lab2.tag;
    }
    
    self.label3 = self.label1;
    
    
    self.label1.font = self.font;
    self.label2.font = self.font;
    
}

下载地址
demo