iphone - 我想在接受用户输入的屏幕上弹出一个小 View (200x200)

Question

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Answer 1

您可以子类化 UIAlertView 类以拥有一个文本字段(或多个文本字段)

您的自定义类如下所示:(AlertPrompt.h)

@interface AlertPrompt : UIAlertView
{
    UITextField *emailTextField;
    UITextField *nameTextField;

}

@property (nonatomic, retain) UITextField *emailTextField;
@property (nonatomic, retain) UITextField *nameTextField;

- (id)initWithTitle:(NSString *)title delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle okButtonTitle:(NSString *)okButtonTitle;
@end

AlertPrompt.m

#import "AlertPrompt.h"

@implementation AlertPrompt
@synthesize emailTextField, nameTextField;

- (id)initWithTitle:(NSString *)title delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle okButtonTitle:(NSString *)okayButtonTitle
{

if (self = [super initWithTitle:title message:@" \n\n\n" delegate:delegate cancelButtonTitle:cancelButtonTitle otherButtonTitles:okayButtonTitle, nil])
{
    self.frame = CGRectMake(0, 0, 300, 400);
    UITextField *nameTF = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 25.0)]; 
    UITextField *emailTF = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 80, 260.0, 25.0)];
    [nameTF setBackgroundColor:[UIColor whiteColor]]; 
    [nameTF setAutocorrectionType:UITextAutocorrectionTypeNo];
    [nameTF setPlaceholder:@"name"];
    [emailTF setBackgroundColor:[UIColor whiteColor]]; 
    [emailTF setAutocorrectionType:UITextAutocorrectionTypeNo];
    [emailTF setPlaceholder:@"email"];

    [self addSubview:nameTF];
    [self addSubview:emailTF];
    self.nameTextField = nameTF;
    self.emailTextField = emailTF;

    if (delegate) {
        self.emailTextField.delegate = delegate;
        self.nameTextField.delegate = delegate;
    }

    [nameTF release];
    [emailTF release];

}
return self;
}
- (void)show
{
    [nameTextField becomeFirstResponder];
    [super show];
}

 - (void)dealloc
{
    [nameTextField release];
    [emailTextField release];

    [super dealloc];
}
@end

你会注意到我在 init 方法中将 @"\n\n\n"作为参数传递，以便为我要显示的文本字段腾出空间..所以你必须根据以下内容修改消息参数您希望在提示中显示的文本字段数。

希望对你有帮助