1. textField输入金额、数字、整数、小数 输入判断
#pragma mark - UITextFieldDelegate
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *toString = [textField.text stringByReplacingCharactersInRange:range withString:string];
if (toString.length) {
NSString *stringRegex;
if (textField == self.teamPriceTF || textField == self.masterPriceTF) {
// 0~99999
stringRegex = @"(\\+)?(([0]|(0[.]\\d{0,2}))|([1-9]\\d{0,4}(([.]\\d{0,2})?)))?";
}
else if (textField == self.prepayPriceTF) {
// 1~9.9
stringRegex = @"([1-9]{1}(([.]\\d{0,1})?))?"
}
else if (textField == self.personCountTF) {
// 2~10
stringRegex = @"[2-9]|10?";
}
else if (textField == self.timersTF) {
// 1~999
stringRegex = @"[1-9]\\d{0,2}?";
}
else if (textField == self.personCountTF) {
// 2~10
stringRegex = @"[2-9]|10?";
}
else if (textField == self.timersTF) {
// 1~999
stringRegex = @"[1-9]\\d{0,2}?";
}
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", stringRegex];
BOOL flag = [phoneTest evaluateWithObject:toString];
return flag;
}
return YES;
}
2.输入个数限制遇上中文输入法高亮部分的问题 + 输入框视图动态高度
注意点:
- 一次性编辑直接用代理、通知就可以监听计算文字字数。
- 当存在编辑的时候 ，代理、通知在给UITextView赋值的时候，是不被调用的，所以给了一个外部方法再赋值的时候调用。
- 当textView输入高度变化的时候回调给外面修改视图的高度。
self.inputView.textView.text = _projectDetail.desc;
[self.inputView textChanged]; // 赋值后调用
.h
@interface PCInputView : UIView <UITextViewDelegate>
@property (nonatomic, strong) UILabel * nameLabel;
@property (nonatomic, strong) UILabel * countLabel;
@property (nonatomic, strong) IQTextView * textView;
// 限制文字字数
@property (nonatomic, assign) NSInteger maxCount;
// 输入框高度变化后整体的高度
@property (nonatomic, copy) void(^inputHightBlock) (CGFloat curHight);
// 文字改变，计算文字-给外界赋值的时候调用
- (void)textChanged;
@end
.m
#pragma mark - bindUI
- (void)bindUI {
// textField 监听输入、计算文字
// [self.textField addTarget:self action:@selector(editChange:) forControlEvents:UIControlEventEditingChanged];
// textView 监听输入、计算文字
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textChangedExt:) name:UITextViewTextDidChangeNotification object:nil];
// 监听输入框的高度变化
[self.textView addObserver:self forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil];
}
#pragma mark - 监听输入 计算文字
- (void)textChangedExt:(NSNotification *)notification {
[self textChanged];
}
- (void)textChanged {
_maxCount = 20;
NSString *toString = self.textView.text;
// 获取高亮部分
UITextRange *selectedRange = [self.textView markedTextRange];
UITextPosition *position = [self.textView positionFromPosition:selectedRange.start offset:0];
// 判断是否存在高亮字符，如果有，则不进行字数统计和字符串截断
if (!position) {
if (toString.length > _maxCount) {
self.textView.text = [toString substringToIndex:_maxCount];
}
self.countLabel.text = [NSString stringWithFormat:@"%zd/%zd", self.textView.text.length, _maxCount];
}
}
#pragma mark - kvo 监听输入框的高度变化 并回调外部 修改整体高度
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
UITextView *textView = (UITextView*)object;
if([keyPath isEqualToString:@"contentSize"]) {
textView.height = textView.contentSize.height;
NSLog(@"%f", textView.height);
!self.inputHightBlock ? : self.inputHightBlock(69+10+textView.height);
}
}
#pragma mark - textView delegate
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if ([text isEqualToString:@"\n"]){
[self endEditing:YES];
return NO;
}
return YES;
}
3.去掉首尾空格
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
// 将字符串首尾空格去掉
textField.text = [textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
return YES;
}
