Crop images for iOS

Source: Internet
Author: User

Uiimage * srcimg = [uiimage imagenamed: @ "test.png"]; // test.png width: 172x192 nslog (@ "image width = % F, Height = % F ", srcimg. size. width, srcimg. size. height); uiimageview * imgview = [[uiimageview alloc] init]; imgview. frame = cgrectmake (10,150,300,220); cgrect rect = cgrectmake (0, 0,300,100); // specify the image area to be cropped Based on the pixel size of the source image, an edge that exceeds the source image size is automatically adapted to cgimageref cgimg = cgimagecreatewithimageinrect ([srcimg cgimage], rect); imgview. image = [uiimage imagewithcgimage: cgimg]; cgimagerelease (cgimg); // The image must be released when it is used up; otherwise, the memory may leak [self. view addsubview: imgview];
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