UI定制 - UISearchBar：文本框圆角 - 低头捡石頭

UI定制 - UISearchBar：文本框圆角

文本框圆角

1 - 思路：对 UIView 进行扩展，在添加的方法中遍历出 UISearchBar 的 UISearchBarSearchFieldBackgroundView，在使用时对其修改即可

// - UIView+Utils.h

#import <UIKit/UIKit.h>
@interface UIView (Utils)
- (UIView*)subViewOfClassName:(NSString*)className;
@end

// - UIView+Utils.m

 1 #import "UIView+Utils.h"
 2 @implementation UIView (Utils)
 3 - (UIView*)subViewOfClassName:(NSString*)className {
 4     for (UIView *subView in self.subviews) {
 5         if ([NSStringFromClass(subView.class) isEqualToString:className]) {
 6             return subView;
 7         }
 8         
 9         UIView *resultFound = [subView subViewOfClassName:className];
10         if (resultFound) {
11             return resultFound;
12         }
13     }
14     return nil;
15 }
16 
17 @end

2 - 如何使用

1 #import "ViewController.h"
2 #import "UIView+Utils.h"

 1 - (void)viewDidLoad {
 2     [super viewDidLoad];
 3     self.view.backgroundColor = [UIColor whiteColor];
 4     
 5     UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(20, 50, self.view.frame.size.width - 40, 40)];
 6     [self.view addSubview:searchBar];
 7 
 8     UIView *backgroundView = [searchBar subViewOfClassName:@"_UISearchBarSearchFieldBackgroundView"];
 9     backgroundView.layer.cornerRadius = 8.0f;// 圆角半径
10     backgroundView.clipsToBounds = YES;
11 
12 }