Objective C memory leak problem -


i have memory leak problem in following objective c code. boldasterisked(***) line line memory leak (mentioned in instrument). idea of it? thanks.

- (uiimage*)part:(float)part ofimage:(uiimage*)imgobject withmask:(uiimage*)imgmask {  uiimage *imgresult = nil;  cgrect rcmask = cgrectmake(0.0f, 0.0f, imgmask.size.width, imgmask.size.height);  cgrect rcobject = cgrectmake(0.5f * (rcmask.size.width - imgobject.size.width), 0.0f, imgobject.size.width, imgobject.size.height * part);   byteptr picturedata = (byteptr)malloc(rcmask.size.width * rcmask.size.height * 4);  cgcontextref picturecontext = cgbitmapcontextcreate(picturedata, rcmask.size.width,              rcmask.size.height,8, rcmask.size.width * 4,cgimagegetcolorspace(imgobject.cgimage),              kcgimagealphapremultipliedlast | kcgbitmapbyteorder32big);   cgcontextcliptomask(picturecontext, rcmask, imgmask.cgimage);  cgimageref imginrect;  imginrect = cgimagecreatewithimageinrect(imgobject.cgimage, rcobject);  cgcontextdrawimage(picturecontext, rcobject, imginrect);  cgimagerelease(imginrect);  ***imgresult = [uiimage imagewithcgimage:cgbitmapcontextcreateimage(picturecontext)];***   cgcontextrelease(picturecontext);  free(picturedata);  return imgresult; } 

imgresult = [uiimage imagewithcgimage:cgbitmapcontextcreateimage(picturecontext)];

you create cgimage, pass uiimage factory method, , forget it. you're leaking cgimage.

do instead:

cgimageref cgresult = cgbitmapcontextcreateimage(picturecontext); if (cgresult) {     imgresult = [uiimage imagewithcgimage: cgresult];     cgimagerelease(cgresult); }

Comments

Post a Comment

Popular posts from this blog

asp.net - repeatedly call AddImageUrl(url) to assemble pdf document -

i'm using abcpdf , i'm curious if can recursively call addimageurl() function assemble pdf document compile multiple urls? something like: int pagecount = 0; int theid = thedoc.addimageurl("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetochain(theid); } pagecount = thedoc.pagecount; console.writeline("1 document page count:" + pagecount); //flatten document (int = 1; <= pagecount; i++) { thedoc.pagenumber = i; thedoc.flatten(); } //now try again theid = thedoc.addimageurl("http://stackoverflow.com/questions/1980890/pdf-report-generation", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetoc
Read more

java - Android recognize cell phone with keyboard or not? -

in android app, want detect user's device if device has keyboard(like motorola milestone) , show corresponding user interface. guys know how that? ! regards justicepenny http://developer.android.com/reference/android/content/res/configuration.html public int keyboard the kind of keyboard attached device. 1 of: keyboard_nokeys, keyboard_qwerty, keyboard_12key. that's it!
Read more

iphone - How would you achieve a LED Scrolling effect? -

how achieve led scrolling effect example below? led sign - led ticker emulator iphone , ipad http://img.skitch.com/20101201-rsfh4p1bajb1wp94k466pdpiuj.preview.jpg sometimes remunerates comment in other posts :) have put code you, should implement font '8pin matrix' realistic feeling. uilabel *label; - (void)viewdidload { [super viewdidload]; label = [[uilabel alloc]initwithframe:cgrectmake(10, 50, 300, 20)]; label.font = [uifont fontwithname:@"courier-bold" size:16.0]; label.backgroundcolor = [uicolor blackcolor]; label.textcolor = [uicolor greencolor]; label.linebreakmode = uilinebreakmodecharacterwrap; // otherwise "…" label.text = @"this led text scrolled "; // blanks space between [self.view addsubview:label]; [nstimer scheduledtimerwithtimeinterval:0.12f target:self selector:@selector(scrolllabel) use
Read more