创建可拉伸的图片

创建可拉伸的图片
UIImage *navBarImage = [[UIImage imageNamed:@"header_bkd.png"]
                                stretchableImageWithLeftCapWidth:5 topCapHeight:0.0];
    [[UINavigationBar appearance] setBackgroundImage:navBarImage
                                       forBarMetrics:UIBarMetricsDefault];

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转载自zl4393753.iteye.com/blog/1637282