Cocos2d中的UITextField示例

Question

任何人都可以建议一些在cocos2d中使用UITextField的链接.我想按标签,然后UITextField应该选择,我需要编辑UITextField.

Answer 1

我在当前项目中执行此操作以允许输入开始播放的级别数,这就是为什么我的变量和方法按照它们的方式命名的原因; 你可能应该调整这些对你有意义.

在您的app控制器中,将其定义为实例变量:

  UITextField *levelEntryTextField;

在applicationDidFinishLaunching中创建它:

  levelEntryTextField = [[UITextField alloc] initWithFrame:
                                              CGRectMake(60, 165, 200, 90)];
  [levelEntryTextField setDelegate:self];

定义激活文本字段的方法.您还应该在app控制器的头文件中声明它.

- (void)specifyStartLevel
{
    [levelEntryTextField setText:@""];
    [window addSubview:levelEntryTextField];
    [levelEntryTextField becomeFirstResponder];    
}

这将使键盘末端编辑按下"返回"

- (BOOL)textFieldShouldReturn:(UITextField*)textField {
  //Terminate editing
  [textField resignFirstResponder];
  return YES;
}

实际完成编辑时会触发此操作.

- (void)textFieldDidEndEditing:(UITextField*)textField {
    if (textField==levelEntryTextField) {
        [levelEntryTextField endEditing:YES];
        [levelEntryTextField removeFromSuperview];
        // here is where you should do something with the data they entered
        NSString *result = levelEntryTextField.text;
    }
}

现在要实际设置动作,你把它放在某个地方.我在一个Scene类中调用它,以响应用户操作:

  [[[UIApplication sharedApplication] delegate] specifyStartLevel];

Answer 2

我举了Jack提供的实例并实际创建了一个工作项目,这是使用Cocos2D 0.7.1 XCode模板完成的,然后编辑*AppDelegate.m/.h文件,这些文件在下面全部提供.我还修改了Jack说的一些内容,因为我觉得在appDidFinishLoading中创建UITextField会占用太多内存,特别是如果文本字段不是一直使用的话...这个解决方案只在它创建文本字段时需要时,示例将绘制一个空的Cocos2D图层场景,并在屏幕触摸时显示文本字段,以便您开始输入文本.它将吐出您输入控制台的结果 - 您可以将其传递给您自己的代码中所需的任何内容.

.h

#import <UIKit/UIKit.h>
#import "cocos2d.h"
@interface MYSCENE : Layer <UITextFieldDelegate>
{
    UITextField *myText;
}
-(void)specificStartLevel;
@end
@interface textFieldTestAppDelegate : NSObject <UIAccelerometerDelegate, UIAlertViewDelegate, UITextFieldDelegate, UIApplicationDelegate>
{
    UIWindow *window;
}
@end

然后是.m

#import "textFieldTestAppDelegate.h"
@implementation MYSCENE
-(id) init
{
    self = [super init];
    isTouchEnabled = YES;
    return self;
}
-(BOOL)ccTouchesBegan:(NSSet  *)touches withEvent:(UIEvent *)event {
    [self specifyStartLevel];
    return kEventHandled;
}
-(void)specifyStartLevel {
    myText = [[UITextField alloc] initWithFrame:CGRectMake(60, 165, 200, 90)];
    [myText setDelegate:self];
    [myText setText:@""];
    [myText setTextColor: [UIColor colorWithRed:255 green:255 blue:255 alpha:1.0]];
    [[[[Director sharedDirector] openGLView] window] addSubview:myText];
    [myText becomeFirstResponder];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField {
    [myText resignFirstResponder];
    return YES;
}
-(void)textFieldDidEndEditing: (UITextField *)textField {
    if(textField == myText) {
        [myText endEditing:YES];
        [myText removeFromSuperview];
        NSString *result = myText.text;
        NSLog([NSString stringWithFormat:@"entered: %@", result]);
    } else {
        NSLog(@"textField did not match myText");
    }
}
-(void) dealloc
{
[super dealloc];
}
@end
@implementation textFieldTestAppDelegate
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [window setUserInteractionEnabled:YES];
    [[Director sharedDirector] setDisplayFPS:YES];
    [[Director sharedDirector] attachInWindow:window];
    Scene *scene = [Scene node];
    [scene addChild: [MYSCENE node]];
    [window makeKeyAndVisible];
    [[Director sharedDirector] runWithScene: scene];
}
-(void)dealloc
{
    [super dealloc];
}
-(void) applicationWillResignActive:(UIApplication *)application
{
    [[Director sharedDirector] pause];
}
-(void) applicationDidBecomeActive:(UIApplication *)application
{
    [[Director sharedDirector] resume];
}
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application
{
    [[TextureMgr sharedTextureMgr] removeAllTextures];
}
@end