jixin_new/shiku_im/ClassesNew/classes/fuliVc/XMGRoolLinghtVIew.m

//
//  XMGRoolLinghtVIew.m
//  testTableVIew
//
//  Created by 123 on 2020/4/30.
//  Copyright © 2020 DR. All rights reserved.
//

#import "XMGRoolLinghtVIew.h"

@interface XMGRoolLinghtVIew()<UITableViewDelegate,UITableViewDataSource>

@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property (strong, nonatomic) CADisplayLink *displayLink;
 
@property (assign,nonatomic) int count;
@end
@implementation XMGRoolLinghtVIew
 

-(void)setDataArr:(NSMutableArray *)dataArr{
    
    _dataArr=dataArr;
    
    [self.tableView reloadData];
}
-(void)awakeFromNib{
    [super awakeFromNib];
    self.count = 0;
    _dataArr=[NSMutableArray array];
   self.tableView.separatorStyle=UITableViewCellSeparatorStyleNone;
    self.tableView.delegate=self;
    self.tableView.dataSource=self;
    self.layer.cornerRadius=5;
       self.layer.masksToBounds=YES;
    
    self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(tick:)];
    [self.displayLink addToRunLoop:[NSRunLoop currentRunLoop]
                           forMode:NSDefaultRunLoopMode];
    //测试数据----->将需要展示的数据进行拼接,比如需要展示的数据数组为 @[@"1",@"2",@"3",@"4",@"5"] 那么需要拼接新数组 为 @[@"1",@"2",@"3",@"4",@"5",@"1",@"2",@"3",@"4",@"5"],示例如下
    [self.tableView setContentOffset:CGPointMake(0, 10) animated:YES];
    self.tableView.userInteractionEnabled = NO;
    //_dataArr = [NSMutableArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"1",@"2",@"3",@"4",@"5", nil];
    
     
}

+(instancetype)XIBXMGRoolLinghtView{
    
    return [[NSBundle mainBundle] loadNibNamed:@"XMGRoolLinghtVIew" owner:nil options:nil].firstObject;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 30;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    return _dataArr.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
     
    packageRoolCell *cell = [packageRoolCell cellWithTableView:tableView];
       
    packageRoolModel *model=_dataArr[indexPath.row];
    
    cell.model=model;
    
    
    return cell;
    
}


//CADisplayLink 定时器 系统默认每秒调用60次
- (void) tick:(CADisplayLink *)displayLink {
    
    self.count ++;
    //(25.0 / 30.0) * (float)self.count) ---> (tableview需要滚动的contentOffset / 一共调用的次数) * 第几次调用
    //比如该demo中 contentOffset最大值为 = cell的高度 * cell的个数 ,5秒执行一个循环则调用次数为 300,没1/60秒 count计数器加1,当count=300时,重置count为0,实现循环滚动.
    [self.tableView setContentOffset:CGPointMake(0, ((15.0 / 30.0) * (float)self.count)) animated:NO];
    
    if (self.count >= 150) {
        
        self.count = 0;
    }
}
- (void)dealloc {
    
    [self.displayLink invalidate];
    self.displayLink = nil;
    
}

@end