自定义UINavigationBar的属性

因为Interface Builder中对NavigationBar的定制修改内容较少,所以需要通过代码方式自定义UINavigationBar,UINavigationItem,UIBarButtonItem,实现修改NavigationBar的背景图(或者背景色),修改NavigationItem中title的属性(如字体,字号,颜色等),BarButtonItem的背景图(或者背景色或者文字).

• //NavigationBar设置背景图 (适合于IOS5以上)
• [__navigationBar__ setBackgroundImage:[UIImage imageNamed:@"__导航条背景图__"] forBarMetrics:UIBarMetricsDefault];
• 
  
• //LeftButton设置属性
• UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
• [leftButton setFrame:CGRectMake(0, 0, __leftButtonWidth__, __leftButtonHeight__)];
• [leftButton setBackgroundImage:[UIImage imageNamed:@"__左按钮背景图__"] forState:UIControlStateNormal];
• [leftButton addTarget:self action:@selector(__leftButtonSelector__) forControlEvents:UIControlEventTouchUpInside];
• [__leftBarButton__ setCustomView:leftButton];
• 
  
• //RightButton设置属性   
• UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
• [rightButton setFrame:CGRectMake(0, 0, __rightButtonWidth__, __rightButtonHeight__)];
• [rightButton setBackgroundImage:[UIImage imageNamed:@"__右按钮背景图__"] forState:UIControlStateNormal];
• [rightButton addTarget:self action:@selector(__rightBarButton__) forControlEvents:UIControlEventTouchUpInside];
• [__rightBarButton__ setCustomView:rightButton];
• 
  
• //NavigationItem设置属性   
• UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
• titleLabel.font = [UIFont boldSystemFontOfSize:__fontOfSize__];
• titleLabel.textColor = __textColor__;
• titleLabel.backgroundColor = [UIColor clearColor];
• titleLabel.textAlignment = UITextAlignmentCenter;
• titleLabel.text = @"__text__";
• __navigationItem__.titleView = titleLabel;

    灰色字体改为自己需要的内容就可以了,如图效果:

自定义UINavigationBar (修改系统自带的)  高度及重新调整View的大小