Tencent/QMUI_iOS

QMUIImagePreviewView 如何设置图片和视频混合轮播查看，我的部分代码设置如下，滑动时出现卡顿。

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#1389 opened on Mar 30, 2022

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help wanted

Description

`- (void)imagePreviewView:(QMUIImagePreviewView *)imagePreviewView renderZoomImageView:(QMUIZoomImageView *)zoomImageView atIndex:(NSUInteger)index { zoomImageView.reusedIdentifier = @(index);

if (index == 1) {
    dispatch_async(dispatch_get_main_queue(), ^{
        AVPlayerItem *item = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"https://ddg-mall-test.obs.cn-north-4.myhuaweicloud.com/dr-test%2Fbusiness%2Ffile%2Fbb0cc146-847d-424a-a9f9-4a5f8576c4d9.mp4"]];
        zoomImageView.videoPlayerItem = item;
    });
} else {
    zoomImageView.image = [UIImage imageNamed:@"image0"];
}

}

  • (QMUIImagePreviewMediaType)imagePreviewView:(QMUIImagePreviewView *)imagePreviewView assetTypeAtIndex:(NSUInteger)index { if (index == 1) { return QMUIImagePreviewMediaTypeVideo; } return QMUIImagePreviewMediaTypeImage; }`

Contributor guide

Tech stack
objective cios
Domain
mobile
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Objective C basicsQMUI library usageiOS AVPlayerItem
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate the lagging issue when mixing image and video in QMUIImagePreviewView. The user sets videoPlayerItem asynchronously on the main queue but still experiences stutter. Check if the video loading is causing main thread stalls. Review the QMUIZoomImageView implementation for potential optimizations. Also consider preloading or caching strategies for videos. Refer to the issue thread for any maintainer guidance.