为什么文本字段代码不适用于 Xcode 8 Obj-C？

Question

ViewController.h

@interface ViewController : UIViewController{

IBOutlet UITextField *Signup;
IBOutlet UITextField *Login;

}
@property(nonatomic, retain)IBOutlet UITextField *Signup;
@property(nonatomic, retain)IBOutlet UITextField *Login;

-(IBAction)TYPE:(id)sender;

ViewController.m

@synthesize Signup;
@synthesize Login;

-(IBAction)TYPE:(id)sender{
[Signup resignFirstResponder];
[Login resignFirstResponder];
}

在模拟器中单击文本字段时，我收到以下错误消息：

2017-04-14 18:43:52.616362 Prototype1[3075:119579] [MC] systemgroup.com.apple.configurationprofiles 路径的系统组容器是 /Users/robertstoley/Library/Developer/CoreSimulator/Devices/09556F3B- A7BC-4DF2-95EB-C3C13B6F39EA/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles 2017-04-14 18:43:52.640402 Prototype1 [3075:119579] [MC] 从私人有效用户设置中读取。 2017-04-14 18:43:52.727 Prototype1[3075:119579] 找不到支持 iPhone-PortraitChoco-NumberPad 键盘类型 4 的键盘；使用 1316927560_PortraitChoco_iPhone-Simple-Pad_Default 2017-04-14 18:43:53.607676 Prototype1 [3075:119579] [Common] _BSMachError：端口 7403； (os/kern) 无效能力 (0x14) “无法插入 COPY_SEND” 2017-04-14 18:43:53.608246 Prototype1 [3075:119579] [Common] _BSMachError: 端口 7403; (os/kern) 无效名称 (0xf) "无法解除分配发送权限"

我已经 2 年没有使用 Xcode 了，但是同样的代码当时运行良好，为什么它不适用于 Xcode 8、iOS 10？

Answer 1

Xcode 8 的模拟器相当冗长。这些消息没有什么特别的意义。

-- 顺便说一句--

您的代码是用一种 非常 旧的风格编写的，不再是最佳实践。更好的是：

@interface ViewController : UIViewController
// It's no longer necessary to have your properties between { and }

@property (nonatomic, weak) IBOutlet UITextField *signup;
@property (nonatomic, weak) IBOutlet UITextField *login;
// IBOutlets should be weak, other properties should be weak or strong for objects, or assign for structs and values.
@end


@implementation ViewController

// You don't have to synthesize your properties anymore.

- (IBAction)type:(id)sender {
    [self.signup resignFirstResponder];
    [_login resignFirstResponder];
    // but you do have to either use self. or underscore to refer to them.
}

@end