我正在浏览创建自定义UINavigationBar的不同选项,因为我的应用程序是iOS 5+,我正在使用此代码:
// Set the background image all UINavigationBars
[[UINavigationBar appearance] setBackgroundImage:NavigationPortraitBackground
forBarMetrics:UIBarMetricsDefault];
现在我想要一个非常右侧的自定义图像按钮,我有点迷失了。我应该采用另一种方式,继承UINavigationBar并为其添加一个按钮,还是会有更简单的方法?
答案 0 :(得分:1)
绝对是这个东西的子类。 UINavigationBar很容易子类化,但很难放入导航控制器。我将向您展示我的子类(CFColoredNavigationBar),它还免费提供任意彩色背景。
//.h
#import <UIKit/UIKit.h>
@interface CFColoredNavigationBar : UINavigationBar
@property (nonatomic, strong) UIColor *barBackgroundColor;
@property (nonatomic, strong) UIButton *postButton;
@end
//.m
#import "CFColoredNavigationBar.h"
@implementation CFColoredNavigationBar
@synthesize barBackgroundColor = barBackgroundColor_;
@synthesize postButton = postButton_;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
-(void)awakeFromNib {
postButton_ = [[UIButton alloc]initWithFrame:CGRectMake(CGRectGetWidth(self.frame)-60, 0, 60.0f, CGRectGetHeight(self.frame))];
[postButton_ setImage:[UIImage imageNamed:@"Post.png"] forState:UIControlStateNormal];
[self addSubview:postButton_];
}
- (void)drawRect:(CGRect)rect {
if (barBackgroundColor_ == nil) {
barBackgroundColor_ = [UIColor blackColor];
}
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [barBackgroundColor_ CGColor]);
CGContextFillRect(context, CGRectInset(self.frame, 0, self.frame.size.height*-2));
}
@end