如何仅在左下角,右下角和左上角的textview中设置角半径？
let rectShape = CAShapeLayer()
rectShape.backgroundColor = UIColor.redColor().CGColor
rectShape.bounds = messages.frame
rectShape.position = messages.center
rectShape.path = UIBezierPath(roundedRect: messages.bounds, byRoundingCorners: .BottomLeft | .TopRight, cornerRadii: CGSize(width: 20, height: 20)).CGPath
messages.layer.addSublayer(rectShape)
这段代码创建了两个rect.我不知道为什么.
当我尝试在Mac上安装scapy时,我收到此错误:
Collecting scapy
Downloading scapy-2.3.1.zip (1.1MB)
100% |????????????????????????????????| 1.1MB 436kB/s
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "/private/tmp/pip-build-f7vu4fsp/scapy/setup.py", line 35
os.chmod(fname,0755)
^
SyntaxError: invalid token
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-f7vu4fsp/scapy
我试过用pip install scapy和pip3 install scapy.
当我尝试从 iCloud Drive 或 Dropbox 将文件导入到我的服务器时， startAccessingSecurityScopedResource()仅返回 false 设备，但在模拟器（Xcode 8、Swift 2.3、最低目标 8.0）中测试时返回 true。
这是我的代码：
{
func showCloudDriveAction(inputBar: NAChatInputBar) {
let documentmenuPicker = UIDocumentMenuViewController(documentTypes: ["public.data"], inMode: .Import)
documentmenuPicker.delegate = self
presentViewController?.presentViewController(documentmenuPicker, animated: true, completion: nil)
}
}
extension NAChatInputBarPresenter: UIDocumentPickerDelegate, UIDocumentMenuDelegate {
public func documentMenu(documentMenu: UIDocumentMenuViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {
documentPicker.delegate = self
self.presentViewController?.presentViewController(documentPicker, animated: true, completion: nil)
}
public func documentPicker(controller: UIDocumentPickerViewController, didPickDocumentAtURL url: NSURL) {
if url.startAccessingSecurityScopedResource() {
guard let path = url.path, data = NSData(contentsOfFile: path) else …您好我有AVCaptureVideoPreviewLayer的问题
let previewLayer: AVCaptureVideoPreviewLayer = AVCaptureVideoPreviewLayer.layerWithSession(captureSession) as AVCaptureVideoPreviewLayer
previewLayer.frame = UIScreen.mainScreen().bounds
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
visageCameraView.layer.addSublayer(previewLayer)
'layerWithSession'不可用:使用对象构造'AVCaptureVideoPreviewLayer(session :)'