为UINavigationBar添加自定义背景

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@implementation UINavigationBar (UINavigationBarCategory) - (void)drawRect:(CGRect)rect {     //颜色填充 //  UIColor *color = [UIColor redColor]; //  CGContextRef context = UIGraphicsGetCurrentContext(); //  CGContextSetFillColor(context, CGColorGetComponents( [color CGColor])); //  CGContextFillRect(context, rect); //  self.tintColor = color;     //图片填充     UIColor *color = [UIColor colorWithRed:46.0f/255.0f green:87.0f/255.0f blue:29.0f/255.0f alpha:1.0f];     UIImage *img    = [UIImage imageNamed: @"bg.png"];     [img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];     self.tintColor = color; } @end

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