可以自动切换子控件内容的View

这里是项目里需要用到一个类似的功能,然后我自己的一个想法.

需求

在tableViewcell上面有几个label,有几行数据,隔5s之后,把label显示的数据换成下一组数据.

功能.gif

这个需要根据cell的frame,label的高度和cell对应的数组的个数来计算每个cell中的label的个数和总共的页数

核心代码

- (void)setUpUI
{
    if (_backGroundColor == nil) {
        self.backgroundColor = [UIColor whiteColor];
    }else{
        self.backgroundColor = _backGroundColor;
    }
    
    //向下取整,每页个数
    self.pageCount = floorf(self.frame.size.height / self.labelHeight);
    //得到总共的页数
    self.pageIndex = ceilf(self.dataSource.count / self.pageCount);
    if (self.dataSource.count % self.pageCount != 0) {
        self.pageIndex++;
    }
    
    NSLog(@"pageCount === %ld", self.pageCount);
    NSLog(@"pageIndex === %ld", self.pageIndex);
    
    
    
    for (int i = 0; i < self.pageCount; i ++) {
        BBCyclingLabel* tempLabel = [self createLabelForAutoViewWithHeight:i * _labelHeight];
        tempLabel.tag = (i + 1) * 100;
        tempLabel.text = [self.dataSource objectAtIndex:i];
        [self addSubview:tempLabel];
    }
    [self performSelector:@selector(toChangeselfSubviews) withObject:nil afterDelay:self.delayTime];
}

- (void)toChangeselfSubviews
{
    //先让当前页+1
    self.currentIndex++;
    NSLog(@"changeTextView");
    if (self.currentIndex < self.pageIndex) {
        NSInteger count = self.currentIndex * self.pageCount;
//        NSLog(@"currentIndex %ld     %ld",self.currentIndex,count);
        for (NSInteger i = count; i < self.pageCount + count; i ++) {
            CFDynamicLabel* tempLabel = [self viewWithTag:(i - count + 1) * 100];
            if (i < self.dataSource.count) {
                tempLabel.text = [self.dataSource objectAtIndex:i];
            }else{
                tempLabel.text = @"";
            }
        }
    }else{
        self.currentIndex = 0;
        NSInteger count = self.currentIndex * self.pageCount;
//        NSLog(@"currentIndex %ld     %ld",self.currentIndex,count);
        for (NSInteger i = count; i < self.pageCount + count; i ++) {
            CFDynamicLabel* tempLabel = [self viewWithTag:(i - count + 1) * 100];
            tempLabel.text = [self.dataSource objectAtIndex:i];
        }
    }
    [self performSelector:@selector(toChangeselfSubviews) withObject:nil afterDelay:self.delayTime];
}

在这里我需要每个cell上面放一个这样的View,所以没有用计时器,而是调用了系统的方法.

附上代码:
https://github.com/WWLJ/AutoChangeContentView/tree/master

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代码中借用了俩位大神的关于label动画的代码
CFDynamicLabel

BBCyclingLabel

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