设置分割线

// 分割线
@property (nonatomic, strong) UIView *lineView;
// 将分割线添加到cell中
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])         
    {        
        [self addSubview:self.lineView];    
    }    
    return self;
}

// 设置分割线Frame
- (void)layoutSubviews{    
    [super layoutSubviews];   
     CGFloat lineX = self.textLabel.frame.origin.x;    
     CGFloat lineH = 1;    
     CGFloat lineY = CGRectGetHeight(self.frame) - 1;    
     CGFloat lineW = CGRectGetWidth(self.frame) - lineX;          
     self.lineView.frame = CGRectMake(lineX, lineY, lineW, lineH);
}

// 懒加载分割线
- (UIView *)lineView{    
    if (_lineView == nil)
    {        
        _lineView = [[UIView alloc] init];        
        _lineView.backgroundColor = [UIColor grayColor];        
        _lineView.alpha = 0.3;    
    }    
    return _lineView;
}