改变项目中一个navigationBar的颜色

self.navigationController.navigationBar.backgroundColor = [UIColor clearColor];

    self.navigationController.navigationBar.barTintColor = [UIColor clearColor];//颜色

    [[[self.navigationController.navigationBar subviews]objectAtIndex:0] setAlpha:0];//透明度

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转载自blog.csdn.net/howlong12345/article/details/51103531