目标-C到Swift转换问题
目标-C到Swift转换问题
提问于 2015-12-29 05:22:13
我正在尝试将苹果自己的示例代码转换成Swift，它只在Objective中编写。
这就是目标C中的内容
.h
@import UIKit;
@class AVCaptureSession;
@interface AAPLPreviewView : UIView
@property (nonatomic) AVCaptureSession *session;
@end.m
@import AVFoundation;
#import "AAPLPreviewView.h"
@implementation AAPLPreviewView
+ (Class)layerClass
{
return [AVCaptureVideoPreviewLayer class];
}
- (AVCaptureSession *)session
{
AVCaptureVideoPreviewLayer *previewLayer = (AVCaptureVideoPreviewLayer *)self.layer;
return previewLayer.session;
}
- (void)setSession:(AVCaptureSession *)session
{
AVCaptureVideoPreviewLayer *previewLayer = (AVCaptureVideoPreviewLayer *)self.layer;
previewLayer.session = session;
}
@end到目前为止，这是我为斯威夫特所做的：
import AVFoundation
import UIKit
class CamPreviewLayer: UIView
{
var session: AVCaptureSession!
override class func layerClass() -> AnyClass
{
return AVCaptureVideoPreviewLayer
}
func session() -> AVCaptureSession {
var previewLayer: AVCaptureVideoPreviewLayer = self.layer as! AVCaptureVideoPreviewLayer
return previewLayer.session
}
func setSession(session: AVCaptureSession) {
let previewLayer: AVCaptureVideoPreviewLayer = self.layer as! AVCaptureVideoPreviewLayer
previewLayer.session = session
}
}我的Swift代码有3个错误。
回答 1
Stack Overflow用户
回答已采纳
发布于 2015-12-29 05:36:54
您必须像这样删除var session: AVCaptureSession。
import AVFoundation
import UIKit
class AVPreviewView : UIView {
override class func layerClass() -> AnyClass {
return AVCaptureVideoPreviewLayer.self
}
func session () -> AVCaptureSession {
return (self.layer as! AVCaptureVideoPreviewLayer).session
}
func setSession(session : AVCaptureSession) -> Void {
(self.layer as! AVCaptureVideoPreviewLayer).session = session;
(self.layer as! AVCaptureVideoPreviewLayer).videoGravity = AVLayerVideoGravityResizeAspect;
}
}希望能帮上忙！
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/34504907
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