{"id":690,"date":"2023-05-30T12:05:05","date_gmt":"2023-05-30T04:05:05","guid":{"rendered":"https:\/\/www.zhidianwl.com\/zhidian\/?p=690"},"modified":"2023-05-30T12:05:05","modified_gmt":"2023-05-30T04:05:05","slug":"ios%e5%bd%95%e5%b1%8f%e5%bc%80%e5%8f%91%e6%9c%89%e9%82%a3%e4%ba%9b%e9%9a%be%e7%82%b9%e5%92%8c%e6%b3%a8%e6%84%8f%e7%82%b9%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.zhidianwl.com\/zhidian\/2023\/690\/","title":{"rendered":"ios\u5f55\u5c4f\u5f00\u53d1\u6709\u90a3\u4e9b\u96be\u70b9\u548c\u6ce8\u610f\u70b9\uff1f"},"content":{"rendered":"<p>iOS\u5f55\u5c4f\u5f00\u53d1\u662f\u6307\u5728iOS\u8bbe\u5907\u4e0a\u5b9e\u73b0\u5f55\u5236\u5c4f\u5e55\u89c6\u9891\u7684\u529f\u80fd\u3002\u5728iOS 11\u53ca\u4ee5\u4e0a\u7248\u672c\uff0c\u82f9\u679c\u516c\u53f8\u5df2\u7ecf\u539f\u751f\u652f\u6301\u4e86\u5c4f\u5e55\u5f55\u5236\u529f\u80fd\uff0c\u4e0d\u8fc7\u5728\u4e00\u4e9b\u5b9a\u5236\u5316\u7684\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u81ea\u5df1\u5f00\u53d1\u5f55\u5c4f\u529f\u80fd\u3002<\/p>\n<p>\u4e00\u3001\u539f\u7406<\/p>\n<p>iOS\u5f55\u5c4f\u7684\u539f\u7406\u662f\u901a\u8fc7\u6355\u6349\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e\uff0c\u7136\u540e\u5c06\u56fe\u50cf\u6570\u636e\u7f16\u7801\u6210\u89c6\u9891\uff0c\u6700\u540e\u5c06\u89c6\u9891\u4fdd\u5b58\u5230\u672c\u5730\u6216\u4e0a\u4f20\u5230\u4e91\u7aef\u3002\u5177\u4f53\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p>1. \u6355\u6349\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e<\/p>\n<p>iOS\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4e00\u4e2a\u540d\u4e3a UIScreen \u7684\u7c7b\uff0c\u53ef\u4ee5\u83b7\u53d6\u5230\u5f53\u524d\u5e94\u7528\u7a0b\u5e8f\u7a97\u53e3\u7684\u5c4f\u5e55\u5bf9\u8c61\uff0c\u901a\u8fc7\u8be5\u5bf9\u8c61\u5373\u53ef\u83b7\u53d6\u5230\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e\u3002<\/p>\n<p>2. \u7f16\u7801\u56fe\u50cf\u6570\u636e\u4e3a\u89c6\u9891<\/p>\n<p>\u5c06\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e\u7f16\u7801\u6210\u89c6\u9891\u9700\u8981\u4f7f\u7528\u5230 AVFoundation \u6846\u67b6\u4e2d\u7684 AVAssetWriter \u7c7b\u3002\u8be5\u7c7b\u53ef\u4ee5\u5c06\u6355\u83b7\u5230\u7684\u56fe\u50cf\u6570\u636e\u7f16\u7801\u6210 H.264 \u683c\u5f0f\u7684\u89c6\u9891\u3002<\/p>\n<p>3. \u4fdd\u5b58\u89c6\u9891\u5230\u672c\u5730\u6216\u4e0a\u4f20\u5230\u4e91\u7aef<\/p>\n<p>\u6700\u540e\uff0c\u5c06\u7f16\u7801\u540e\u7684\u89c6\u9891\u4fdd\u5b58\u5230\u672c\u5730\u6216\u4e0a\u4f20\u5230\u4e91\u7aef\uff0c\u53ef\u4ee5\u4f7f\u7528\u7cfb\u7edf\u63d0\u4f9b\u7684 API \u6216\u7b2c\u4e09\u65b9\u5e93\u5b9e\u73b0\u3002<\/p>\n<p>\u4e8c\u3001\u8be6\u7ec6\u4ecb\u7ecd<\/p>\n<p>1. \u6355\u6349\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e<\/p>\n<p>\u5728 iOS \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 UIScreen \u7c7b\u83b7\u53d6\u5230\u5f53\u524d\u5e94\u7528\u7a0b\u5e8f\u7a97\u53e3\u7684\u5c4f\u5e55\u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7\u8be5\u5bf9\u8c61\u5373\u53ef\u83b7\u53d6\u5230\u5c4f\u5e55\u4e0a\u7684\u56fe\u50cf\u6570\u636e\u3002<\/p>\n<p>&#8220;`<\/p>\n<p>UIScreen *mainScreen = [UIScreen mainScreen];<\/p>\n<p>CGRect screenRect = mainScreen.bounds;<\/p>\n<p>UIGraphicsBeginImageCont<\/p>\n<p><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.cdn.yimenapp.com\/2023-03\/31\/15\/18515473874.jpg\" \/><\/figure>\n<\/p>\n<p>ext(screenRect.size);<\/p>\n<p>CGContextRef ctx = UIGraphicsGetCurrentContext();<\/p>\n<p>[mainScreen snapshotViewAfterScreenUpdates:NO].layer renderInContext:ctx];<\/p>\n<p>UIImage *image = UIGraphicsGetImageFromCurrentImageContext();<\/p>\n<p>UIGraphicsEndImageContext();<\/p>\n<p>&#8220;`<\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u83b7\u53d6\u5230 UIScreen \u5b9e\u4f8b\uff0c\u7136\u540e\u83b7\u53d6\u5230\u5c4f\u5e55\u7684\u5927\u5c0f\uff0c\u63a5\u7740\u5f00\u542f\u4e00\u4e2a\u56fe\u5f62\u4e0a\u4e0b\u6587\uff0c\u5c06\u5c4f\u5e55\u7684\u56fe\u50cf\u7ed8\u5236\u5230\u56fe\u5f62\u4e0a\u4e0b\u6587\u4e2d\uff0c\u6700\u540e\u83b7\u53d6\u5230\u56fe\u50cf\u6570\u636e\u3002<\/p>\n<p>2. \u7f16\u7801\u56fe\u50cf\u6570\u636e\u4e3a\u89c6\u9891<\/p>\n<p>\u5c06\u6355\u83b7\u5230\u7684\u56fe\u50cf\u6570\u636e\u7f16\u7801\u6210\u89c6\u9891\u9700\u8981\u4f7f\u7528\u5230 AVFoundation \u6846\u67b6\u4e2d\u7684 AVAssetWriter \u7c7b\u3002\u5728\u4f7f\u7528 AVAssetWriter \u7c7b\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u521b\u5efa\u4e00\u4e2a AVAssetWriter \u5b9e\u4f8b\uff0c\u5e76\u8bbe\u7f6e\u597d\u8f93\u51fa\u8def\u5f84\u3001\u89c6\u9891\u5927\u5c0f\u3001\u7f16\u7801\u683c\u5f0f\u7b49\u53c2\u6570\u3002<\/p>\n<p>&#8220;`<\/p>\n<p>NSString *videoPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@&#8221;test.mp4&#8243;];<\/p>\n<p>NSURL *videoUrl = [NSURL fileURLWithPath:videoPath];<\/p>\n<p>AVAssetWriter *assetWriter = [[AVAssetWriter alloc] initWithURL:videoUrl fileType:AVFileTypeMPEG4 error:nil];<\/p>\n<p>NSDictionary *outputSettings = @{<\/p>\n<p>    AVVideoCodecKey: AVVideoCodecH264,<\/p>\n<p>    AVVideoWidthKey: @(screenRect.size.width),<\/p>\n<p>    AVVideoHeightKey: @(screenRect.size.height)<\/p>\n<p>};<\/p>\n<p>AVAssetWriterInput *assetWriterInput = [[AVAssetWriterInput alloc] initWithMediaType:AVMediaTypeVideo outputSettings:outputSettings];<\/p>\n<p>assetWriterInput.expectsMediaDataInRealTime = YES;<\/p>\n<p>[assetWriter addInput:assetWriterInput];<\/p>\n<p>&#8220;`<\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a AVAssetWriter \u5b9e\u4f8b\uff0c\u6307\u5b9a\u4e86\u8f93\u51fa\u8def\u5f84\u548c\u6587\u4ef6\u7c7b\u578b\u3002\u7136\u540e\uff0c\u6211\u4eec\u8bbe\u7f6e\u4e86\u7f16\u7801\u53c2\u6570\uff0c\u5305\u62ec\u7f16\u7801\u683c\u5f0f\u3001\u89c6\u9891\u5927\u5c0f\u7b49\u3002\u63a5\u7740\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a AVAssetWriterInput \u5b9e\u4f8b\uff0c\u6307\u5b9a\u4e86\u5a92\u4f53\u7c7b\u578b\u4e3a\u89c6\u9891\uff0c\u8f93\u51fa\u53c2\u6570\u4e3a\u4e0a\u9762\u8bbe\u7f6e\u7684\u7f16\u7801\u53c2\u6570\uff0c\u540c\u65f6\u8bbe\u7f6e expectsMediaDataInRealTime \u5c5e\u6027\u4e3a YES\uff0c\u8868\u793a\u8f93\u5165\u6570\u636e\u662f\u5b9e\u65f6\u7684\u3002\u6700\u540e\uff0c\u6211\u4eec\u5c06 AVAssetWriterInput \u5b9e\u4f8b\u6dfb\u52a0\u5230 AVAssetWriter 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