iPhone开发兑现点击一个UIImageView时打开键盘

iPhone开发实现点击一个UIImageView时打开键盘 .
同样的需求，做Android客户端时在没有文本框时也可以通过inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);调出系统键盘。

但是，IOS中貌似没有这样的接口，所以可以采用“隐藏文本框”的方式，调出系统键盘，具体实现如下：


1、在ViewController.xib上放置一个ImageView和一个UITextField（代码中将其设置为隐藏），如下：

[img]

[/img]





2、ViewController.h如下：

#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UITextFieldDelegate>{    BOOL hasOpenKeyBoard;//是否打开键盘}@property(strong,nonatomic)IBOutlet UIImageView *imgView;@property(strong,nonatomic)IBOutlet UITextField *textField;-(IBAction)showKeyBoard:(id)sender;@end

3、ViewController.m如下：

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController@synthesize imgView;@synthesize textField;- (void)viewDidLoad{    [super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.    //隐藏文本框    textField.hidden = YES;    //设置代理    textField.delegate = self;    hasOpenKeyBoard = false;}- (void)viewDidUnload{    [super viewDidUnload];    // Release any retained subviews of the main view.}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    NSLog(@"touchesBegan...");    //[imgView becomeFirstResponder];    if(!hasOpenKeyBoard){        [textField becomeFirstResponder];    }else{        [textField resignFirstResponder];    }    hasOpenKeyBoard=!hasOpenKeyBoard;}#pragma mark UITextFieldDelegate Methods- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{    NSLog(@"string=%@",string);    return YES;}@end

方法shouldChangeCharactersInRange中可以监听到键盘输入。





4、效果如下：
[img]

[/img]

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