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我的项目有Objective-C文件和Swift文件(混合搭配,感谢https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html)。import swift class into Objective-C works,but some custom file not
现在,我在我的项目中添加一个名为'Helper'的新文件夹,以包含我可以在任何类中使用的函数。
我的Controller
文件夹中的任何快速类都包含在my-project.swift.h
中,我可以在任何Objective-C类中使用它,而不会有任何问题。但是,这里是问题所在,我不能在我自己创建的Helper
文件夹(它位于Controller
文件夹之外)中使用swift类,所以我无法在我的Objective-C类中使用它。任何解决方案?这里是我的帮手文件
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);
}
}
检查您的构建阶段 - >编译源代码,并确保'包括imageHelper.swift'。 –