iOS中Navbar设置渐变色效果的方法示例

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设置渐变色

#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];

}

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