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toolbar.showsBaselineSeparator = NO;

self.textField.focusRingType = NSFocusRingTypeNone;

// 1
NSString *appPath = @"/Applications/Foxmail.app";
[[NSWorkspace sharedWorkspace] openFile:appPath];
// 2
[[NSWorkspace sharedWorkspace] launchApplication:@"Foxmail"];

[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:@"https://www.baidu.com"]];

// 生成纯色图片

+ (UIImage *)pureColorImageWithColor:(UIColor *)color {
  CGSize imageSize = CGSizeMake(1.0f, 1.0f);
  UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0f);

  CGContextRef theContext = UIGraphicsGetCurrentContext();
  CGContextSetFillColorWithColor(theContext, color.CGColor);
  CGContextFillRect(theContext, CGRectMake(0.0f, 0.0f, imageSize.width, imageSize.height));

  CGImageRef theCGImage = CGBitmapContextCreateImage(theContext);
  UIImage *theImage;
  if ([[UIImage class] respondsToSelector:@selector(imageWithCGImage:scale:orientation:)]) {
      theImage = [UIImage imageWithCGImage:theCGImage scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp];
  } else {
      theImage = [UIImage imageWithCGImage:theCGImage];
  }
  CGImageRelease(theCGImage);

  return theImage;
  }
  // 生成纯色圆角图片

+ (UIImage *)pureColorImageWithSize:(CGSize)size
      color:(UIColor *)color
  cornRadius:(CGFloat)radius {
  UIGraphicsBeginImageContextWithOptions(size, NO, 0);
  CGContextRef cxt = UIGraphicsGetCurrentContext();

  CGContextSetFillColorWithColor(cxt, color.CGColor);
  CGContextSetStrokeColorWithColor(cxt, color.CGColor);

  CGContextMoveToPoint(cxt, size.width, size.height-radius);
  CGContextAddArcToPoint(cxt, size.width, size.height, size.width-radius, size.height, radius);//右下角
  CGContextAddArcToPoint(cxt, 0, size.height, 0, size.height-radius, radius);//左下角
  CGContextAddArcToPoint(cxt, 0, 0, radius, 0, radius);//左上角
  CGContextAddArcToPoint(cxt, size.width, 0, size.width, radius, radius);//右上角
  CGContextClosePath(cxt);
  CGContextDrawPath(cxt, kCGPathFillStroke);
  UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return image;
  }

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

      __weak typeof(self) weakSelf = self;
   dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [UIView animateWithDuration:coordinator.transitionDuration animations:^{
            [self setNeedsStatusBarAppearanceUpdate];
            [self.alertView layoutValidateWithSize:size];
        }];
    });
}

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    if (coordinator) {
        [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    }
    
    @try {
        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
            __weak typeof(self) weakSelf = self;
            [UIView animateWithDuration:0.5 animations:^{
                if (weakSelf) {
                    if ([weakSelf respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
                        [weakSelf setNeedsStatusBarAppearanceUpdate];
                    }
                    if (weakSelf.alertView) {
                        [weakSelf.alertView layoutValidateWithSize:size];
                    }
                }
            }];
        }];
    } @catch (NSException *exception) {
        //
    } @finally {
        //
    }
}