#import "NavigationViewController.h"#define LBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]@interface NavigationViewController ()@end@implementation NavigationViewController-(UIStatusBarStyle)preferredStatusBarStyle{ return UIStatusBarStyleLightContent;}- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.navigationBar.translucent = YES; CAGradientLayer *gradientLayer = [CAGradientLayer layer]; UIColor *color1= LBColor(255, 70, 93); UIColor *color2 = LBColor(251, 108, 42); gradientLayer.colors = @[(__bridge id)color1.CGColor, (__bridge id)color2.CGColor]; gradientLayer.locations = @[@0.5, @1.0]; gradientLayer.startPoint = CGPointMake(0, 0); gradientLayer.endPoint = CGPointMake(1.0, 0); gradientLayer.frame = CGRectMake(0, -20, self.view.frame.size.width, 64); [self.navigationBar.layer addSublayer:gradientLayer];}