the new draw

[guodongZhao]

• (void)drawPaint{ UIGraphicsBeginImageContext(self.drawImage.frame.size); [self.drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)]; CGContextRef context = UIGraphicsGetCurrentContext();

  CGGradientRef myGradient;
  CGColorSpaceRef myColorspace;
  size_t num_locations = 2;
  CGFloat locations[2] = { 0.0, 1.0 };
  CGFloat components[8] = { 0.0, 0.0, 0.0, 0.2,  // Start color
        0.0, 0.0, 0.0, 0.0 }; // End color
  
  myColorspace = CGColorSpaceCreateDeviceRGB();
  myGradient = CGGradientCreateWithColorComponents (myColorspace, components,
                                                                                                  locations, num_locations);
  
  CGPoint start, end;

  // CGContextSaveGState(context); CGRect paintRect = CGRectMake(currentPoint.x - self.m_brushSize/2, currentPoint.y - self.m_brushSize/2, self.m_brushSize, self.m_brushSize); CGContextClipToRect(context, paintRect); start = end = CGPointMake(currentPoint.x, currentPoint.y); CGFloat startRadius = demoRGInnerRadius(paintRect); CGFloat endRadius = demoRGOuterRadius(paintRect); CGContextDrawRadialGradient(context, myGradient, start, startRadius, end, endRadius, kCGGradientDrawsBeforeStartLocation); // CGContextRestoreGState(context);

  self.drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();

  }

[guodongZhao]

// 版本号

define bundleID [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]

self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];

// 判断第一次使用（升级也算第一次使用）
// 存放的BOOL只为NO，证明第一次使用app
if (![[NSUserDefaults standardUserDefaults] boolForKey:bundleID]) {
    NSLog(@"加载引导页");
    UIStoryboard *st = [UIStoryboard storyboardWithName:@"welcome" bundle:nil];
    self.window.rootViewController = st.instantiateInitialViewController;        
}
else {
    NSLog(@"直接进入应用");
    UIStoryboard *st = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    self.window.rootViewController = st.instantiateInitialViewController;
}

[self.window makeKeyAndVisible];

return YES;