self.navigationController.navigationBar.barTintColor=[self getColor:@"2c2e30" withAlpha:1.0];
//方法
- (UIColor *)getColor:(NSString *)hexColor withAlpha:(float )alpha
{
unsigned int red,green,blue;
NSRange range;
range.length = 2;
range.location = 0;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&red];
range.location = 2;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&green];
range.location = 4;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&blue];
return [UIColor colorWithRed:(float)(red/255.0f) green:(float)(green / 255.0f) blue:(float)(blue / 255.0f) alpha:alpha];
}
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