iOS 实现类似抖音翻页滚动结果 - ToB企服应用市场:ToB评测及商务社交产业平台

//
// DouyinScrollViewController.m
// TEXT
//
// Created by mac on 2024/4/28.
// Copyright © 2024 刘博. All rights reserved.
//
#import "DouyinScrollViewController.h"
#import "DouyinScrollTableViewCell.h"
static CGFloat const height = 700;
@interface DouyinScrollViewController () <UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, assign) NSInteger currentIndex;
@property (nonatomic, assign) CGFloat velocity;
@property (nonatomic, strong) NSMutableArray *colorArray;
@end
@implementation DouyinScrollViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self.view addSubview:self.tableView];
self.colorArray = [NSMutableArray array];
for (int i = 0; i < 10; i ++) {
int r = arc4random() % 255;
int g = arc4random() % 255;
int b = arc4random() % 255;
CGFloat rr = r / 255.0;
CGFloat rg = g / 255.0;
CGFloat rb = b / 255.0;
UIColor *color = [[UIColor alloc]initWithRed:rr green:rg blue:rb alpha:1];
[self.colorArray addObject:color];
}
[self.tableView reloadData];
// Do any additional setup after loading the view.
}
#pragma mark - UITableViewDelegate, UITableViewDataSource
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
DouyinScrollTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:NSStringFromClass([DouyinScrollTableViewCell class])];
[cell updateWithColor:self.colorArray[indexPath.row]];
// cell.textLabel.text = [NSString stringWithFormat:@"%ld",indexPath.row];
// cell.backgroundColor = self.colorArray[indexPath.row];
// if (!cell.contentView.backgroundColor) {
// cell.contentView.backgroundColor = self.colorArray[indexPath.row];
// }
// return cell;
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 10;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return height;
}
#pragma mark - scrolllVIewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
}
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{
self.velocity = velocity.y;
}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
dispatch_async(dispatch_get_main_queue(), ^{
CGPoint translatedPoint = [scrollView.panGestureRecognizer translationInView:scrollView];
//UITableView禁止响应其他滑动手势
scrollView.panGestureRecognizer.enabled = NO;
CGFloat translateCheck = 60;
NSLog(@"哈哈哈哈获取停止拖动时候的速度%f", self.velocity);
if (fabs(self.velocity) > 0.4) {
translateCheck = 8;
}
if(translatedPoint.y < -translateCheck && self.currentIndex < 10) {
self.currentIndex ++; //向下滑动索引递增
}
if(translatedPoint.y > translateCheck && self.currentIndex > 0) {
self.currentIndex --; //向上滑动索引递减
}
[UIView animateWithDuration:0.15
delay:0.0
options:UIViewAnimationOptionCurveEaseOut animations:^{
//UITableView滑动到指定cell
[self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:self.currentIndex inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];
} completion:^(BOOL finished) {
//UITableView可以响应其他滑动手势
scrollView.panGestureRecognizer.enabled = YES;
}];
});
}
#pragma mark - lazy load
- (UITableView *)tableView
{
if (!_tableView) {
_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 60 - height, CGRectGetWidth(self.view.bounds), height * 3) style:UITableViewStylePlain];
[_tableView registerClass:[DouyinScrollTableViewCell class] forCellReuseIdentifier:NSStringFromClass([DouyinScrollTableViewCell class])];
_tableView.rowHeight = height;
_tableView.contentInset = UIEdgeInsetsMake(height , 0, height, 0);
_tableView.estimatedRowHeight = height;
_tableView.delegate = self;
_tableView.dataSource = self;
_tableView.backgroundColor = [UIColor redColor];
_tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
_tableView.separatorInset = UIEdgeInsetsZero;
}
return _tableView;
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end

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