UISearchBar实用技巧

UISearchBar作为搜索条有的时候我们需要做一些自定的内容，让它看着有点与众不同，先来看一张效果图:

SearBar.gif

第一个搜索框自定义设置的比较多，颜色设置的有点夸张，仅供参考，设置过程如下:
1.设置默认的搜索文字

   self.searchBar.placeholder = @"FlyElephant";

2.设置取消按钮的文字及颜色

   self.searchBar.cancelTitle = @"中山郎";
   self.searchBar.tintColor   = [UIColor greenColor];

3.设置搜索框边框及光标颜色:

   UITextField *searchField = [self.searchBar valueForKey:@"searchField"];
   if (searchField) {
       [searchField setBackgroundColor:[UIColor whiteColor]];
       searchField.layer.cornerRadius  = 13.0f;
       searchField.layer.borderColor   = [UIColor redColor].CGColor;
       searchField.layer.borderWidth   = 1;
       searchField.layer.masksToBounds = YES;
       //光标颜色
       [searchField setTintColor:[UIColor blueColor]];
   }

4.取消默认的灰色背景区域

   self.searchBar.backgroundImage = [[UIImage alloc] init];

5.隐藏取消按钮:

   self.nextSearchBar.showsCancelButton=NO;

6.设置输入文本的大小及颜色:

   self.searchBar.textColor=[UIColor redColor];
   self.searchBar.textFont=[UIFont systemFontOfSize:14];

7.设置迷你搜索框:

   self.nextSearchBar.searchBarStyle=UISearchBarStyleMinimal;

第一步和第六步中的属性是通过分类实现:

@implementation UISearchBar (FESearchBar)

-(NSString *)cancelTitle {
    return [objc_getAssociatedObject(self, cancelTitleKey) string];
}

-(void)setCancelTitle:(NSString *)cancelTitle {
   if (IS_IOS9) {
       [[UIBarButtonItem appearanceWhenContainedInInstancesOfClasses:@[[UISearchBar class]]] setTitle:cancelTitle];
   }else {
       [[UIBarButtonItem appearanceWhenContainedIn:[UISearchBar class], nil] setTitle:cancelTitle];
   }
    objc_setAssociatedObject(self,cancelTitleKey,cancelTitle, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIFont *)textFont {
   return objc_getAssociatedObject(self, textFontKey);
}

-(void)setTextFont:(UIFont *)textFont {
   if (IS_IOS9) {
       [UITextField appearanceWhenContainedInInstancesOfClasses:@[[UISearchBar class]]].font = textFont;
   }else {
       [[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setFont:textFont];
   }
   objc_setAssociatedObject(self,textFontKey,textFont, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIColor *)textColor{
   return objc_getAssociatedObject(self, textColorKey);
}

-(void)setTextColor:(UIColor *)textColor {
   if (IS_IOS9) {
       [UITextField appearanceWhenContainedInInstancesOfClasses:@[[UISearchBar class]]].textColor = textColor;
   }else {
       [[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:textColor];
   }
   objc_setAssociatedObject(self,textColorKey,textColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

@end

如果有问题欢迎探讨，代码地址:FlyElephant的GitHub

UISearchBar实用技巧

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