【工作随笔】iOS 屏幕截屏

iOS 屏幕截屏

1. 截取当前屏幕

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(screenWidth*screenScale, screenHeight*screenScale), YES, 0);
    //设置截屏大小
    [[[[UIApplication sharedApplication] keyWindow] layer] renderInContext:UIGraphicsGetCurrentContext()];
    
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    CGImageRef imageRef = viewImage.CGImage;
    CGRect rect = CGRectMake(0, 0, screenWidth*screenScale,screenHeight*screenScale);
   
    CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
    UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect];

 

2. 从view上截图

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(150, 150), NO, 1.0);  //NO，YES 控制是否透明
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    // 生成后的image

 

3.