我需要将Objective-C转换为
Swift以从通讯簿中获取联系人的图像.但是我从CFData转换为NSData时遇到错误,我不知道如何使它工作.我该怎么做才能使这项工作正常进行?
在Objective-C中:
ABRecordID contactID = ABRecordGetRecordID(contactRef); ABAddressBookRef addressBook = ABAddressBookCreate(); ABRecordRef origContactRef = ABAddressBookGetPersonWithRecordID(addressBook,contactID); if (ABPersonHasImageData(origContactRef)) { NSData *imgData = (NSData*)ABPersonCopyImageDataWithFormat(origContactRef,kABPersonImageFormatOriginalSize); img = [UIImage imageWithData: imgData]; [imgData release]; } CFRelease(addressBook); return img;
在Swift中:
var image: UIImage! if ABPersonHasImageData(person) { var imgData = (ABPersonCopyImageDataWithFormat(person,kABPersonImageFormatOriginalSize)) image = UIImage.imageWithData(imgData) //Here get the error }
如中所述
Working with Cocoa Data Types,您必须使用takeUnretainedValue()或takeRetainedValue()将非托管对象转换为内存管理对象.
在你的情况下
Working with Cocoa Data Types,您必须使用takeUnretainedValue()或takeRetainedValue()将非托管对象转换为内存管理对象.
在你的情况下
if (ABPersonHasImageData(person)) { let imgData = ABPersonCopyImageDataWithFormat(person,kABPersonImageFormatOriginalSize).takeRetainedValue() let image = UIImage(data: imgData) }
因为ABPersonCopyImageDataWithFormat()返回一个(1)保留值.