UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(originX, originY, width, height)];
textView.backgroundColor = [UIColor whiteColor];
textView.font = [UIFont systemFontOfSize:12];
textView.placeholderColor = [UIColor redColor];
textView.placeholderLabel.font = [UIFont systemFontOfSize:12];
textView.textColor = [UIColor redColor];
textView.placeholder = @"请输入...";
textView.delegate = self;
[self.view addSubview:textView];
//设置textview是否可编辑
@property (assign, nonatomic) BOOL isContentTextViewEnable;
#pragma mark textview delegate
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if ([text isEqualToString:@""]) {
return YES;
}else{
return self.isContentTextViewEnable;
}
}
- (void)textViewDidChange:(UITextView *)textView {
NSDictionary *attibute = @{
@"body":@[[UIFont systemFontOfSize:11],[UIColor colorWithRed:0 green:0 blue:0 alpha:0.3]],
@"num":[UIColor colorWithRed:255/255.0 green:80/255.0 blue:11/255.0 alpha:1.0f]
};
self.isContentTextViewEnable = true;
//获取当前键盘类型
UITextInputMode *mode = (UITextInputMode *)[UITextInputMode activeInputModes][0];
//获取当前键盘语言
NSString *lang = mode.primaryLanguage;
//如果语言是汉语(拼音)
if ([lang isEqualToString:@"zh-Hans"]) {
//取到高亮部分范围
UITextRange *selectedRange = [self.clubIntroTextView markedTextRange];
//取到高亮部分
UITextPosition *position = [self.clubIntroTextView positionFromPosition:selectedRange.start offset:0];
//如果取不到高亮部分,代表没有拼音
if (!position){
//当超过最大字数限制时
if (self.clubIntroTextView.text.length > 48) {
//对超出部分进行裁剪
self.clubIntroTextView.text = [self.clubIntroTextView.text substringToIndex:48];
//同时将可继续书写属性设为否,shouldChangeTextInRange方法会调用
self.isContentTextViewEnable = NO;
}
}else {
//表示还有高亮部分，暂不处理
}
}else {
//如果语言不是汉语,直接计算
if (self.clubIntroTextView.text.length > 48) {
self.clubIntroTextView.text = [self.clubIntroTextView.text substringToIndex:48];
self.isContentTextViewEnable = NO;
}
}
}
//如果需要配合键盘移动，不需要忽略
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
//监听textfield输入文字的个数
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textFieldDidChange:)
name:@"UITextFieldTextDidChangeNotification" object:self.clubNameTextField];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
#pragma mark 键盘的通知
- (void)keyboardWillShow:(NSNotification *)noti {
NSValue *frameValue = [dict valueForKey:UIKeyboardFrameEndUserInfoKey];
CGRect frame = [frameValue CGRectValue];
//获取弹键盘前的偏移量
self.offsetY = self.tableView.contentOffset.y;
CGFloat height = frame.size.height;
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, height, 0);
//将tableview滚动到textfield对应的行
[self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:7 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:NO];//这里一定要设置为NO，动画可能会影响到scrollerView，导致增加数据源之后，tableView到处乱跳
}
- (void)keyboardWillHide:(NSNotification *)noti {
self.tableView.contentInset = UIEdgeInsetsZero;
}
