UITextView使用技巧(二)

来源：互联网发布：雷神vpn软件编辑：程序博客网时间：2024/05/18 03:59

关闭键盘的几种方式

(1)如果你程序是有导航条的，可以在导航条上面多加一个Done的按钮，用来退出键盘。代码如下:

- (void)textViewDidBeginEditing:(UITextView *)textView{    UIBarButtonItem *done = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone                                                                           target:self                                                                           action:@selector(leaveEditMode)] autorelease];    self.navigationItem.rightBarButtonItem = done;}- (void)textViewDidEndEditing:(UITextView *)textView{    self.navigationItem.rightBarButtonItem = nil;}- (void)leaveEditMode{        [self.myTextView resignFirstResponder];}

(2)如果你的textview里不用回车键，可以把回车键当做退出键盘的响应键。代码如下:

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{    if ([text isEqualToString:@"\n"])    {        [textView resignFirstResponder];        return NO;    }        return YES;}

(3)也可以在弹出的键盘上面加一个view来放置退出键盘的Done按钮。代码如下:

#import "ViewController.h"@implementation ViewController@synthesize myTextView;#pragma mark - view life cycle- (void)viewDidLoad{    [super viewDidLoad];    UIToolbar *topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];    [topView setBarStyle:UIBarStyleBlack];    UIBarButtonItem *helloButton = [[UIBarButtonItem alloc]initWithTitle:@"Hello" style:UIBarButtonItemStyleBordered target:self action:nil];    UIBarButtonItem *btnSpace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];    UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];    NSArray * buttonsArray = [NSArray arrayWithObjects:helloButton,btnSpace,doneButton,nil];    [topView setItems:buttonsArray];    [doneButton release];    [btnSpace release];    [helloButton release];    [self.myTextView setInputAccessoryView:topView];}- (void)dismissKeyBoard{    [self.myTextView resignFirstResponder];}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}