iOS中UITextView键盘回收

时间:2020-12-24 23:38:21

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。

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