启动屏中要添加图片经常会出现图片无法展示的问题
查了很多资料，最后得出一个对我来说有用的结论
1、将图片添加到根目录中
2、将图片添加到Assets.xcassets中
3、在LaunchScreen.storyboard中添加一个UIImageView，然后添加Assets.scassets中的图片即可
Easher shalyf
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| #import <mach/mach.h> | |
| #import <sys/sysctl.h> | |
| + (double)cpuUsage { | |
| kern_return_t kr; | |
| task_info_data_t tinfo; | |
| mach_msg_type_number_t task_info_count; | |
| task_info_count = TASK_INFO_MAX; | |
| kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)tinfo, &task_info_count); |
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| func resolveDictionary(fromTXTRecord data: Data) -> [String: String] { | |
| var dict = [String: String]() | |
| var offset = 0 | |
| let bytes = data.bytes | |
| while offset < bytes.count { | |
| let recordLength = Int(bytes[offset]) | |
| offset += 1 | |
| print(recordLength) | |
| if recordLength > 0 { | |
| let subBytes = bytes[offset..<offset + recordLength] |
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| let resources = PHAssetResource.assetResources(for: asset) | |
| let videoResource = resources.first(where: { $0.type == .video || $0.type == .pairedVideo })! | |
| let url = URL(fileURLWithPath: FileManager.Folder.tmp.append(pathComponent: "test.MOV")) | |
| let resourceOptions = PHAssetResourceRequestOptions() | |
| resourceOptions.isNetworkAccessAllowed = true | |
| PHAssetResourceManager.default().writeData(for: videoResource, toFile: url, options: resourceOptions, completionHandler: { (error) in | |
| print(error == nil) | |
| }) |
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| expr (Class)NSClassFromString(@"IBARevealLoader") == nil ? (void *)dlopen("/Applications/Reveal.app/Contents/SharedSupport/iOS-Libraries/RevealServer.framework/RevealServer", 0x2) : ((void*)0) |
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| #define clamp(a) (a>255?255:(a<0?0:a)) | |
| + (UIImage *)imageFromSampleBuffer:(CMSampleBufferRef)sampleBuffer { | |
| CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); | |
| CVPixelBufferLockBaseAddress(imageBuffer, 0); | |
| if (CVPixelBufferGetPlaneCount(imageBuffer) < 2) { | |
| CVPixelBufferUnlockBaseAddress(imageBuffer, 0); | |
| return nil; | |
| } |
shalyf
/ LaunchScreen.md
Last active
January 10, 2018 07:53
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| let isBlackColor = { (x: Int, y: Int) -> Bool in | |
| let byteIndex = (bytesPerRow * y) + x * bytesPerPixel | |
| let r = CGFloat(rawData[byteIndex]) | |
| let g = CGFloat(rawData[byteIndex + 1]) | |
| let b = CGFloat(rawData[byteIndex + 2]) | |
| // https://stackoverflow.com/a/12043228 | |
| let luma = 0.2126 * r + 0.7152 * g + 0.0722 * b | |
| return luma < 40 | |
| } |
shalyf
/ undefined_symbols.md
Last active
July 9, 2020 08:17
Undefined symbols for architecture arm64
在Swift中使用Google Nearby API的时候，遇到了以下错误
Undefined symbols for architecture arm64:
"OBJC_CLASS$_GNSMessageManager", referenced from:
objc-class-ref in TBGNSMessager.o
"OBJC_CLASS$_GNSMessage", referenced from:
objc-class-ref in TBGNSMessager.o
shalyf
/ CVPixelBuffer(vImage).swift
Last active
January 6, 2024 20:46
CVPixelBuffer通过vImage转换成CGImage
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| import Accelerate.vImage | |
| func getImageBuffer(from pixelBuffer: CVPixelBuffer) -> vImage_Buffer? { | |
| var buffer = vImage_Buffer() | |
| let bitmapInfo = CGBitmapInfo(rawValue: CGBitmapInfo.byteOrder32Little.rawValue | CGImageAlphaInfo.first.rawValue) | |
| var cgFormat = vImage_CGImageFormat(bitsPerComponent: 8, | |
| bitsPerPixel: 32, | |
| colorSpace: nil, | |
| bitmapInfo: bitmapInfo, | |
| version: 0, |
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