UITextView
最后更新于：2022-04-01 06:59:26
~~~
1.创建并初始化
@property (nonatomic, strong) UITextView *textView;
// 创建
self.textView = [[UITextView alloc] initWithFrame:self.view.frame];
// 设置textview里面的字体颜色
self.textView.textColor = [UIColor blackColor];
// 设置字体名字和字体大小
self.textView.font = [UIFont fontWithName:@"Arial" size:18.0];
// 设置代理
self.textView.delegate = self;
// 设置它的背景颜色
self.textView.backgroundColor = [UIColor whiteColor];
self.textView.text = @“hehe”;
// 返回键的类型
self.textView.returnKeyType = UIReturnKeyDefault;
// 键盘类型
self.textView.keyboardType = UIKeyboardTypeDefault;
// 是否可以拖动
self.textView.scrollEnabled = YES;
2. UITextView退出键盘的几种方式
（1）如果你程序是有导航条的，可以在导航条上面加多一个Done的按钮，用来退出键盘，当然要先实现UITextViewDelegate。
- (void)textViewDidBeginEditing:(UITextView *)textView {
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(getOverEditing)];
}
- (void)textViewDidEndEditing:(UITextView *)textView {
self.navigationItem.rightBarButtonItem = nil;
}
- (void)getOverEditing{
[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。
#pragma mark - UITextView Delegate Methods
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if ([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
（3）还有你也可以自定义其他视图控件加载到键盘上用来退出，比如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)];
UIBarButtonItem * cancelButton= [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];
NSArray * buttonsArray = @[cancelButton];
[topView setItems:buttonsArray];
[self.textView setInputAccessoryView:topView];
-(void)dismissKeyBoard
{
[tvTextView resignFirstResponder];
}
3.UITextView自定选择文字后的菜单
在ViewDidLoad中加入：
- (void)viewDidLoad
{
[super viewDidLoad];
self._textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 100, 300, 200)];
[self.view addSubview:_textView];
UIMenuItem *menuItem = [[UIMenuItem alloc]initWithTitle:@“我是自定义的菜单" action:@selector(didClickCustomMenuAction)];
UIMenuController *menu = [UIMenuController sharedMenuController];
[menu setMenuItems:[NSArray arrayWithObject:menuItem]];
[menuItem release];
}
当然上面那个@selector里面的changeColor方法还是自己写吧，也就是说点击了我们自定义的菜单项后会触发的方法。
然后还得在代码里加上一个方法：
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if(action ==@selector(changeColor) || action == @selector(copy:))
{
if(_textView.selectedRange.length>0)
return YES;
}
return NO;
}
-(void)didClickCustomMenuAction
{
NSLog(@"%@“,__function__);
}
~~~