ios7 uinavigationbar下面的黑线

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默认UINavigationbar样式

准备用于替换的背景

替换后的效果

if ([self.navigationController.navigationBar respondsToSelector:@selector( setBackgroundImage:forBarMetrics:)]){

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"top_bg"] forBarMetrics:UIBarMetricsDefault];

}

具体方法如下：

if ([self.navigationController.navigationBar respondsToSelector:@selector( setBackgroundImage:forBarMetrics:)]){

NSArray *list=self.navigationController.navigationBar.subviews;

for (id obj in list) {

if ([obj isKindOfClass:[UIImageView class]]) {

UIImageView *imageView=(UIImageView *)obj;

imageView.hidden=YES;

}

UIImageView *imageView=[[UIImageView alloc] initWithFrame:CGRectMake(0, -20, 420, 64)];

imageView.image=[UIImage imageNamed:@"top_bg"];

[self.navigationController.navigationBar addSubview:imageView];

[self.navigationController.navigationBar sendSubviewToBack:imageView];

}

最终效果：

参考文章：http://stackoverflow.com/questions/19037464/how-to-remove-uinavigationbar-and-uisearchbar-hairline

http://zhangmingwei.iteye.com/blog/2020543

http://www.cocoachina.com/ask/questions/show/107489

http://96888869.blog.163.com/blog/static/13176318220140815932695/

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