iOS截屏耗性能最低的方法

//截屏 过滤掉自定义的window
+(void)createScreenShot:(NSString *)account withPicName:(NSString *)picName WithScale:(CGFloat)scale byFilter:(UIWindow *)window {
    //过滤掉小window
    [UIView animateWithDuration:0.005 animations:^{
        window.alpha=0.0;
    } completion:^(BOOL finished) {
        [self createScreenShot:account withPicName:picName WithScale:scale WithCompress:0.3];
        window.alpha=1.0;
    }];
}

//截取小图（自定义路径）
+(void)keepScreenShotWithSmallPicName:(NSString *)name  WithImageOfSmallRect:(CGRect)frame fileDir:(NSString *)dir WithScale:(CGFloat)scale
{
    UIImage * image=[self getImageWithFullScreenshot:scale];//大图
    CGRect rect=frame;
    CGImageRef sourceImageRef = [image CGImage];
    CGImageRef newImageRef = CGImageCreateWithImageInRect(sourceImageRef, rect);
    UIImage * newImage = [UIImage imageWithCGImage:newImageRef];//小图
    CGImageRelease(newImageRef);
    UIGraphicsEndImageContext();
    NSData * smallScreenData =UIImagePNGRepresentation(newImage);
//保存起来
    [XLHelpClass writeFileContentNsData:[NSString stringWithFormat:@"%@",dir] withName:name withData:smallScreenData];
}

转载于:https://www.jianshu.com/p/3d394efd3e35