ios - Serious error when trying to draw a circle on screen -

-

इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 1 जवाब

मैं आकर्षित करने की कोशिश कर रहा हूँ एक चक्र है, इसलिए मुझे निम्नलिखित विधि मिलती है: 

  - (शून्य) ड्रॉरेक्ट: (सीजीआरटीएक्ट) रीक्स्ट {सीजीआरएक्ट प्रमुखक्रिकल = सीजीआरएक्टइसेट (रीक्ट, 2, 2) ;; UIBezierPath * aPath = [UIBezierPath bezierPathWithOvalInRect: अग्रणीक्रैक]; CGContextRef aRef = UIGraphicsGetCurrentContext (); CGContextTranslateCTM (एआरएफएफ, 20, 20); CGContextSetRGBFillColor (एआरएफएफ़, 0.1, 0.05, 0.9, 1); CGContextSetRGBStrokeColor (aRef, 0, 0, 0, 1); CGContextRestoreGState (आरिफ); }

फिर मैं इसे viewDidLoad से कहता हूं: 

  सीआरजीआरएआर myRect = CGRectMake (0, 0, 60, 60); [आत्म drawRect: myRect];

लेकिन कुछ भी नहीं खींचा गया है और कंसोल में निम्न संदेश दिखाता है:

CGContextSetRGBFillColor: अमान्य संदर्भ 0x0। यह एक गंभीर त्रुटि है यह एप्लिकेशन, या एक लाइब्रेरी जो इसका उपयोग करता है, एक अमान्य संदर्भ का उपयोग कर रहा है और जिससे सिस्टम स्थिरता और विश्वसनीयता के समग्र स्तर में गिरावट है। यह नोटिस एक शिष्टाचार है: कृपया इस समस्या को ठीक करें। यह आगामी अपडेट में एक गंभीर त्रुटि बन जाएगा।

अग्रिम धन्यवाद।

इस के साथ अपना कोड बदलें। 

  - (शून्य) ड्रॉरेक्ट: (सीजीआरएक्ट) रीक्स्ट {CGContextRef context = UIGraphicsGetCurrentContext (); CGContextSetLineWidth (संदर्भ, 4.0); CGContextSetStrokeColorWithColor (संदर्भ, [UIColor blueColor] .CGColor); CGRect आयत = सीजीआरएक्टमेक (60,170,200,80); CGContextAddEllipseInRect (संदर्भ, आयत); CGContextStrokePath (संदर्भ); }

Comments

Post a Comment

Popular posts from this blog

c++ - C/pp Sockets, recv()/send() works only under gdb -

-
Edit: In the socket: The CanReceive () argument was the reason I was checking the input 1 millisecond While stepping into GDB, everything worked out. I have a problem with C sock send () / recv () do nothing if they are in non-debug mode. Even if std :: cout can not return their return value for some reason std :: cout is not working in my method I std: : Cerr can not even make a mistake It does not make sense to check that in GDB, because everything works perfectly as a virus in non-debug mode. C does not. //b - buffer // s - size // sd - socket descriptor int32_t TCP :: reception (char * b, uint32_t s) {error :: critical. SetErrorNumber (error: List :: noor); If (! Socket :: valid (sd)) {error :: serious .sitemember (error :: list :: invalid socket); Return -1; } If (Disconnect ()) {Error :: Critical. SetErrorNumber (Error :: List :: Notepanked); Return -1; } If returned (! Socket :: canvasive (SD, readtimeout)) incorrect; If (! B) {B = new four [S + 1]; Std :: mem...
Read more

GO: Serve static pages -

-
I'm trying to display a static page with Go. Go: Package main import "net / http" function main () {fs: = http.FileServer (http.Dir ("static / house")) Http: .handle ("/", fs) http.ListenAndServe (": 4747", zero)} directory: project / stable home Html edit.html project.go When I run it, the web page displays links to edit.html and home.html instead of displaying a static page from home.html is. What am I doing wrong. Is this the best way to serve files? I know that there are other ways like From the HTML / templates package, but I'm not sure what is the difference between each of these methods and when. Thanks! fancy main () {http.Handle ("/", http.FileServer (Http) .ir ("static")) http.ListenAndServe (": 4747", zero)} You do not need static / home , just Static . and when you do not have index.html in / static , the directory instead Content appears. Just change the name of...
Read more

objective c - How to open front/back camera at the same time in iOS developing? -

-
I want to use the front and rear camera at the same time in iOS development: when I take a photo back After the camera, the front camera can be opened and another can take a photo. By the way, these two photos are in a picture: vertical arrangement. Has anyone done this before? UIImagePickerController to take the picture, and to determine which camera is used Is in. / P> To merge the pictures, I found an example through search (its recommendation in the future)
Read more