獲取CIImage從UIImage的（SWIFT）

Question

試圖從UIImage的，以將其用於CIFilter獲得CIImage，但收到以下異常在最後一行：

Execution was interrupted, reason: EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0) 

我在做什麼錯？

import UIKit 

UIGraphicsBeginImageContextWithOptions(CGSizeMake(100,100), false, 0) 
let con:CGContextRef = UIGraphicsGetCurrentContext() 
CGContextAddEllipseInRect(con, CGRectMake(0,0,100,100)) 
CGContextSetFillColorWithColor(con, UIColor.blueColor().CGColor) 
CGContextFillPath(con) 
let im:UIImage = UIGraphicsGetImageFromCurrentImageContext() 
UIGraphicsEndImageContext() 

let ciimage = CIImage(image: im) // <- Exception here 

UPDATE： 繼建議不要實例CIImage作爲可變我返工我最初的代碼片段在操場的工作：

UIGraphicsBeginImageContextWithOptions(CGSizeMake(100,100), false, 0) 
let con:CGContextRef = UIGraphicsGetCurrentContext() 
CGContextAddEllipseInRect(con, CGRectMake(0,0,100,100)) 
CGContextSetFillColorWithColor(con, 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) 

Answer 1

如果你試圖使用過濾器來工作，我解決了這個遊樂場的bug：

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())