UIActionSheet中加入UITextField，键盘无法输入的问题

2013-09-02 05:30:06 465 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

刚开始做IOS移动开发，遇到一些问题，希望大牛们来积极解答，主要问题就是我在UIActionSheet中加入了一个UITextField控件，点击控件的时候，可以弹出键盘，并且点击[X]键也可以删除UITextField中的内容，但是无法输入内容，网上看了一些解答主要是设置KeyWindow，代码中已经标出来，但是没有效果，还有一个小问题，就是我设置了UIActionSheet的frame之后，也没效果，代码中也标出了,下面贴上代码
.h文件



#import <UIKit/UIKit.h>



@interface ViewController : UIViewController<UIActionSheetDelegate, UITextFieldDelegate>

{

    UIActionSheet * sheet;

}



@end

.m文件



#import "ViewController.h"



@interface ViewController ()



@end



@implementation ViewController



-(void)btnClicked:(id)sender

{

    UIButton * btn = (UIButton*)sender;

    [sheet dismissWithClickedButtonIndex:btn.tag animated:YES];

}



- (void)buttonClicked:(id)sender

{

    sheet = [[UIActionSheet alloc] initWithTitle:@"爱情宣言\n\n\n\n\n\n\n\n\n" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles: nil];

    

    sheet.frame = CGRectMake(0, 260, 320, 480); //不起作用，求解释？

    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 100, 320, 40)];

    textField.backgroundColor = [UIColor whiteColor];

    textField.text = @"我爱景妃";

    textField.textAlignment = NSTextAlignmentCenter;

    textField.delegate = self;

    [sheet addSubview:textField];

    [textField release];

    

    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(140, 150, 80, 40)];

    [btn setTitle:@"永不言弃" forState:UIControlStateNormal];

    btn.tag = 100;

    [btn addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

    [sheet addSubview:btn];

    [btn release];

    

    [sheet showInView:self.view];

    [sheet release];

}



- (void)viewDidLoad

{

    [super viewDidLoad];

	// Do any additional setup after loading the view, typically from a nib.

    

    UIButton * btn1 = [[UIButton alloc] initWithFrame:CGRectMake(100, 200, 80, 40)];

    [btn1 setTitle:@"Click Me" forState:UIControlStateNormal];

    [btn1 addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

    btn1.backgroundColor = [UIColor blackColor];

    [self.view addSubview:btn1];

    

}



- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



- (void)dealloc

{

    [sheet release];

    [super dealloc];

}



#pragma mark action sheet delegate method





#pragma mark textfield delegate method

- (void)textFieldDidBeginEditing:(UITextField *)textField

{

    sheet.frame = CGRectMake(0, 100, 320, 480);

    

    if (!textField.window.isKeyWindow) {             //网上很多说不是keywindow的问题，但是我改了还是无效，求高手帮忙解答，不胜感激

        [textField.window makeKeyAndVisible];

    }

}





- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    sheet.frame = CGRectMake(0, 260, 320, 480);

    [textField resignFirstResponder];

}



@end