UI定制 - UITextField：紧致双击后的拷贝、复制、粘贴等操作

双击后禁止响应

1 - 代码示例：新建 UITextField 子类 UITextFieldNoRes，重写 canPerformAction: withSender: 方法

// - UITextFieldNoRes.m

#import "UITextFieldNoRes.h"
@implementation UITextFieldNoRes

// 禁止双击文本框后的相应
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {

    UIMenuController *menuController = [UIMenuController sharedMenuController];
    if (menuController) {
        [UIMenuController sharedMenuController].menuVisible = NO;
    }

    return NO;
}

@end

2 - 验证

#import "ViewController.h"
#import "UITextFieldNoRes.h"
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor cyanColor];
    
    UITextFieldNoRes *testTF = [[UITextFieldNoRes alloc] initWithFrame:CGRectMake(40, 230, self.view.frame.size.width - 80, 50)];
    testTF.backgroundColor = [UIColor redColor];
    testTF.placeholder = @"尝试双击";
    [self.view addSubview:testTF];
}

@end

运行效果