这里出现错误。绞尽脑汁。尝试了各种组合。
找不到类型“NSDictionary”的初始化程序，该初始化程序接受类型“(object:(Int), forKey: CFString!)”的参数列表
// configure the pixel format - Obj-C
// videoOutput.videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA], (id)kCVPixelBufferPixelFormatTypeKey, nil];
// Swift
videoOutput.videoSettings = NSDictionary(object: Int(kCVPixelFormatType_32BGRA), forKey:kCVPixelBufferPixelFormatTypeKey)
更新：斯威夫特 5.7
videoOutput.videoSettings = [
kCVPixelBufferPixelFormatTypeKey as String: Int(kCVPixelFormatType_32BGRA)
]
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