尝试从UI
Image获取CI
Image以便将其用于CIFilter,但在最后一行获得以下异常：
Execution was interrupted,reason: EXC_BREAKPOINT (code=EXC_I386_BPT,subcode=0x0)
我究竟做错了什么？
import UIKit UIGraphicsBeginImageContextWithOptions(CGSizeMake(100,100),false,0) let con:CGContextRef = UIGraphicsGetCurrentContext() CGContextAddEllipseInRect(con,CGRectMake(0,100,100)) CGContextSetFillColorWithColor(con,UIColor.blueColor().CGColor) CGContextFillPath(con) let im:UIImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() let ciimage = CIImage(image: im) // <- Exception here
更新：
根据不将CIImage实例化为变量的建议,我重新设计了我的初始代码片段,以便在游乐场中工作：
UIGraphicsBeginImageContextWithOptions(CGSizeMake(100,UIColor.blueColor().CGColor)
CGContextFillPath(con)
let im:UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
//let ciimage = CIImage(image: im) // <- this was causing an exception
let filter = CIFilter(name: "CIGaussianBlur",withInputParameters: [kCIInputRadiusKey: 10,kCIInputImageKey: CIImage(image: im)]) // <- this does not cause an exception
let calayer = CALayer()
calayer.contents = CIContext(options:nil).createCGImage(filter.outputImage,fromRect: filter.outputImage.extent())
calayer.frame = CGRect(x: 0,y: 0,width: 270,height: 270)
var view = UIView()
view.frame = calayer.frame
view.layer.addSublayer(calayer)
XCPShowView("view",view)
解决方法
如果您正在尝试使用过滤器,我解决了这个操场错误：
let pic = UIImage(named: "crumpled.jpg") let filter = CIFilter(name: "CISepiaTone") filter.setValue(CIImage(image: pic),forKey: kCIInputImageKey) filter.setValue(0.8,forKey: kCIInputIntensityKey) let ctx = CIContext(options:nil) let cgImage = ctx.createCGImage(filter.outputImage,fromRect:filter.outputImage.extent())
