iOS截屏功能代码

   大家都知道通过同时按iphone和ipad关机键和home键可以进行截图&＃xff0c;也可以通过代码编程进行对屏幕的截图。

使用opengles截图并保存代码&＃xff1a;

相关连接

-(UIImage *) glToUIImage {NSInteger myDataLength &＃61; 1024 * 768 * 4;// allocate array and read pixels into it.GLubyte *buffer &＃61; (GLubyte *) malloc(myDataLength);glReadPixels(0, 0, 1024, 768, GL_RGBA, GL_UNSIGNED_BYTE, buffer);// gl renders "upside down" so swap top to bottom into new array.// there&＃39;s gotta be a better way, but this works.GLubyte *buffer2 &＃61; (GLubyte *) malloc(myDataLength);for(int y &＃61; 0; y <768; y&＃43;&＃43;){for(int x &＃61; 0; x <1024 * 4; x&＃43;&＃43;){buffer2[(767 - y) * 1024 * 4 &＃43; x] &＃61; buffer[y * 4 * 1024 &＃43; x];}}// make data provider with data.CGDataProviderRef provider &＃61; CGDataProviderCreateWithData(NULL, buffer2, myDataLength, NULL);// prep the ingredientsint bitsPerComponent &＃61; 8;int bitsPerPixel &＃61; 32;int bytesPerRow &＃61; 4 * 1024;CGColorSpaceRef colorSpaceRef &＃61; CGColorSpaceCreateDeviceRGB();CGBitmapInfo bitmapInfo &＃61; kCGBitmapByteOrderDefault;CGColorRenderingIntent renderingIntent &＃61; kCGRenderingIntentDefault;// make the cgimageCGImageRef imageRef &＃61; CGImageCreate(1024, 768, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);// then make the uiimage from thatUIImage *myImage &＃61; [UIImage imageWithCGImage:imageRef];return myImage;
}-(void)captureToPhotoAlbum {UIImage *image &＃61; [self glToUIImage];UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);
}


使用苹果官网截图并保存

相关连接

-(void)ScreenShots
{[self unschedule:&＃64;selector(ScreenShots)];CGSize imageSize &＃61; [[UIScreen mainScreen] bounds].size;if (NULL !&＃61; UIGraphicsBeginImageContextWithOptions) {UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);}else{UIGraphicsBeginImageContext(imageSize);}CGContextRef context &＃61; UIGraphicsGetCurrentContext();for (UIWindow * window in [[UIApplication sharedApplication] windows]) {if (![window respondsToSelector:&＃64;selector(screen)] || [window screen] &＃61;&＃61; [UIScreen mainScreen]) {CGContextSaveGState(context);CGContextTranslateCTM(context, [window center].x, [window center].y);CGContextConcatCTM(context, [window transform]);CGContextTranslateCTM(context, -[window bounds].size.width*[[window layer] anchorPoint].x, -[window bounds].size.height*[[window layer] anchorPoint].y);[[window layer] renderInContext:context];CGContextRestoreGState(context);}}UIImage *image &＃61; UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();NSThread *thread&＃61;[[NSThread alloc] initWithTarget:self selector:&＃64;selector(saveThread:) object:image];[thread start];[thread release];NSLog(&＃64;"Suceeded!");
}-(void)saveThread:(UIImage*)image
{NSAutoreleasePool *pool&＃61;[[NSAutoreleasePool alloc]init];UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);[pool release];
}