小编use*_*236的帖子

我有一个UIImageView名字bigBottle:

bigBottle.image =  [UIImage imageNamed:@"fullBootle.png"];

fullBootle.png 是一个装满100%的瓶子.

我需要两个步骤:

1. 首先用百分比制作一幅图像(比如50%填充) - 也就是说,从底部填充一半的瓶子).

2. 动画bigBottle从瓶子的下方爬行填充效果到50%填充.我的代码如下:

   CGRect captureRect = CGRectMake(0,22,18,72);
   UIImage *captureImg;
   UIGraphicsBeginImageContext(captureRect.size);
   CGContextRef context = UIGraphicsGetCurrentContext();
   [self.bigBottle.layer renderInContext:context];
   captureImg = UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();
   self.bigBottle.image = [UIImage imageWithCGImage:CGImageCreateWithImageInRect(captureImg.CGImage,
   captureRect)];
   CGRect captureRect1 = CGRectMake(0,37,18,72);
   self.bigBottle.frame=CGRectMake(45, 174,18,1);
   CGRect newFrameOfMyView1 = CGRectMake(45,129, 18, 45);
   [UIView animateWithDuration:3.0f
       animations:^{
           self.bigBottle.frame = newFrameOfMyView1;
       }
       completion:^(BOOL finished){
           NSLog( @"done bottle: 1" );
   }];
   

   Run Code Online (Sandbox Code Playgroud)

另一种方法是让这个装瓶的动画更加简单,内存效率更高？我有几十个瓶子随机填充百分比(让我们说瓶子80是20%填满)并且没有模糊的结果图像？