IOS 开发UITextView回收或关闭键盘
iOS开发中,发现UITextView没有像UITextField中textFieldShouldReturn:这样的方法,那么要实现UITextView关闭键盘,就必须使用其他的方法,下面是可以使用的几种方法。
1.如果你程序是有导航条的,可以在导航条上面加多一个Done的按钮,用来退出键盘,当然要先实UITextViewDelegate。
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- ( 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.textView resignFirstResponder];
}
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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。
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-( BOOL )textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if ([text isEqualToString:@ "\n" ]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
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这样无论你是使用电脑键盘上的回车键还是使用弹出键盘里的return键都可以达到退出键盘的效果。
3.第三种方法感觉效果比上面两种都好,就是在弹出的键盘上面加一个view来放置退出键盘的Done按钮。
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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];
[doneButton release];
[btnSpace release];
[helloButton release];
[topView setItems:buttonsArray];
[tvTextView setInputAccessoryView:topView];
-(IBAction)dismissKeyBoard
{
[tvTextView resignFirstResponder];
}
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感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://www.cnblogs.com/jingxin1992/p/6061856.html