在导航条的下方加上阴影 navgationbar
工程需要包含 QuartzCore.Framework。
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//
// UINavigationBar+JTDropShadow.h
//
// Created by james on 9/20/11.
// http://ioscodesnippet.tumblr.com
//
#import
@interface
UINavigationBar
(JTDropShadow)
- (
void
)dropShadowWithOffset:(CGSize)offset
radius
:(CGFloat)radius
color
:(
UIColor
*)color
opacity
:(CGFloat)opacity;
@end
//
// UINavigationBar+JTDropShadow.m
//
// Created by james on 9/20/11.
// http://ioscodesnippet.tumblr.com
//
#import "UINavigationBar+JTDropShadow.h"
#import
@implementation
UINavigationBar
(JTDropShadow)
- (
void
)dropShadowWithOffset:(CGSize)offset
radius
:(CGFloat)radius
color
:(
UIColor
*)color
opacity
:(CGFloat)opacity {
// Creating shadow path for better performance
CGMutablePathRef
path = CGPathCreateMutable();
CGPathAddRect(path,
NULL
,
self
.bounds
);
self
.layer
.shadowPath
= path;
CGPathCloseSubpath(path);
CGPathRelease(path);
self
.layer
.shadowColor
= color
.CGColor
;
self
.layer
.shadowOffset
= offset;
self
.layer
.shadowRadius
= radius;
self
.layer
.shadowOpacity
= opacity;
// Default clipsToBounds is YES, will clip off the shadow, so we disable it.
self
.clipsToBounds
=
NO
;
}
@end
//用法如下
- (
void
)viewDidLoad {
[
super
viewDidLoad
];
...
[
self
.navigationController
.navigationBar
dropShadowWithOffset
:CGSizeMake(
0
,
3
)
radius
:
1
color
:[
UIColor
darkGrayColor
]
opacity
:
1
];
...
}
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