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[英]How to import swift file to objective-c class, for class delegation?
[英]import swift class into objective-C works, but some custom file not
我的項目有Objective-C文件和Swift文件(混合使用,感謝https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html )。
現在,我在項目上添加了一個名為“ Helper”的新文件夾,以包含可以在任何類中使用的功能。
我的Controller
文件夾中的任何swift類都包含在my-project.swift.h
並且我可以在任何Objective-C類中使用它而不會出現任何問題。 但是,這是問題所在,我無法在我自己創建的Helper
文件夾內使用swift類(它在Controller
文件夾外部),因此無法在我的Objective-C類上使用它。 有什么解決辦法嗎? 這是我的助手文件
import Foundation
public class imageHelper{
func ResizeImage(image: UIImage, targetSize: CGSize) -> UIImage {
let size = image.size
let widthRatio = targetSize.width / image.size.width
let heightRatio = targetSize.height / image.size.height
// Figure out what our orientation is, and use that to form the rectangle
var newSize: CGSize
if(widthRatio > heightRatio) {
newSize = CGSizeMake(size.width * heightRatio, size.height * heightRatio)
} else {
newSize = CGSizeMake(size.width * widthRatio, size.height * widthRatio)
}
// This is the rect that we've calculated out and this is what is actually used below
let rect = CGRectMake(0, 0, newSize.width, newSize.height)
// Actually do the resizing to the rect using the ImageContext stuff
UIGraphicsBeginImageContextWithOptions(newSize, false, 1.0)
image.drawInRect(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}
func imageWithSize(image: UIImage,size: CGSize)->UIImage{
if UIScreen.mainScreen().respondsToSelector("scale"){
UIGraphicsBeginImageContextWithOptions(size,false,UIScreen.mainScreen().scale);
}
else
{
UIGraphicsBeginImageContext(size);
}
image.drawInRect(CGRectMake(0, 0, size.width, size.height));
let newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
//Summon this function VVV
func resizeImageWithAspect(image: UIImage,scaledToMaxWidth width:CGFloat,maxHeight height :CGFloat)->UIImage
{
let oldWidth = image.size.width;
let oldHeight = image.size.height;
let scaleFactor = (oldWidth > oldHeight) ? width / oldWidth : height / oldHeight;
let newHeight = oldHeight * scaleFactor;
let newWidth = oldWidth * scaleFactor;
let newSize = CGSizeMake(newWidth, newHeight);
return imageWithSize(image, size: newSize);
}
}
我想到了! 只需更改此代碼
public class imageHelper{
進入這個
class imageHelper: NSObject{
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