图片拉伸问题

2016-11-25 本文已影响14人凡尘一笑

UIImage *image = [UIImage imageNamed:@"chat_send_nor"];

// 1.2 拿到image的尺寸
CGFloat imageWidth = image.size.width;
CGFloat imageHeight = image.size.height;


###方式一
UIImage *resizableImage = [image resizableImageWithCapInsets:UIEdgeInsetsMake(imageHeight * 0.5, imageWidth * 0.5, imageHeight * 0.5 -1, imageWidth * 0.5 - 1) resizingMode:UIImageResizingModeTile];
[self.button setBackgroundImage:image forState:UIControlStateNormal];


###方式二

/*
   右边需要保护的区域 = 图片的width - leftCapWidth - 1
   底部需要保护的区域 =  height - topCapHeight - 1
 */
UIImage *resizableImage = [image stretchableImageWithLeftCapWidth:imageWidth * 0.5 topCapHeight:imageHeight * 0.5];
[self.button setBackgroundImage:image forState:UIControlStateNormal];