自定义导航栏按钮

首先，写一个类，继承于UIButton。

 

头文件：

 

#import <Foundation/Foundation.h>

@interface BlueButton : UIButton {
	
}

- (id)init;

@end

 

实现文件：

 

#import "BlueButton.h"

@implementation BlueButton

- (id)init {
  if(self = [super init]) {
    self.frame = CGRectMake(0, 0, 49.0, 30.0);
    self.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
    self.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
		
    UIImage *image = [UIImage imageNamed:@"blueButton.jpg"];
    UIImage *stretchImage = [image stretchableImageWithLeftCapWidth:15.0 topCapHeight:0.0];
    [self setBackgroundImage:stretchImage forState:UIControlStateNormal];
		
    self.backgroundColor = [UIColor clearColor];
    [self setTitleShadowColor:[UIColor blackColor] forState:UIControlStateNormal];
    self.titleShadowOffset = CGSizeMake(0, -1);
    self.titleLabel.font = [UIFont boldSystemFontOfSize:13];
  }
	
  return self;
}

@end

 

示例：

 

- (void)viewDidLoad {
	[super viewDidLoad];
	
	BlueButton *blueButton = [[BlueButton alloc] init];	
	[blueButton setTitle:@"Add" forState:UIControlStateNormal];	
	[blueButton addTarget:self action:@selector(add)
			 forControlEvents:UIControlEventTouchUpInside];
	
	UIBarButtonItem *button = [[UIBarButtonItem alloc]
														 initWithCustomView:blueButton];
	self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(Cancel)];
	self.navigationItem.rightBarButtonItem = button;
	
	[button release];
	[blueButton release];
}

 

示例图：