UISearchBar作為搜索條有的時候我們需要做一些自定的內(nèi)容，讓它看著有點(diǎn)與眾不同，先來看一張效果圖:

SearBar.gif

第一個搜索框自定義設(shè)置的比較多，顏色設(shè)置的有點(diǎn)夸張，僅供參考，設(shè)置過程如下:
1.設(shè)置默認(rèn)的搜索文字

   self.searchBar.placeholder = @"FlyElephant";

2.設(shè)置取消按鈕的文字及顏色

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

3.設(shè)置搜索框邊框及光標(biāo)顏色:

   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;
       //光標(biāo)顏色
       [searchField setTintColor:[UIColor blueColor]];
   }

4.取消默認(rèn)的灰色背景區(qū)域

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

5.隱藏取消按鈕:

   self.nextSearchBar.showsCancelButton=NO;

6.設(shè)置輸入文本的大小及顏色:

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

7.設(shè)置迷你搜索框:

   self.nextSearchBar.searchBarStyle=UISearchBarStyleMinimal;

第一步和第六步中的屬性是通過分類實(shí)現(xiàn):

@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

如果有問題歡迎探討，代碼地址:FlyElephant的GitHub