文本框 光标,键盘退出,间距之问题

1.textField明文暗文光标位置不对

明文暗文光标不对.png

解决方案:在切换明文暗文的方法上写入 
[self.oldPwdTextField becomeFirstResponder];

2.加入了scrollView导致,监听键盘退出失效

解决方案:给scrollView增加一个分类,并重写以下几个方法

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesBegan:touches withEvent:event];
    [super touchesBegan:touches withEvent:event];
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesMoved:touches withEvent:event];
    [super touchesMoved:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesEnded:touches withEvent:event];
    [super touchesEnded:touches withEvent:event];
}

3.限制UITextField内只能输入0~9的数字

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    return [self validateNumber:string];
}

- (BOOL)validateNumber:(NSString*)number {
    BOOL res = YES;
    NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];
    int i = 0;
    while (i < number.length) {
        NSString * string = [number substringWithRange:NSMakeRange(i, 1)];
        NSRange range = [string rangeOfCharacterFromSet:tmpSet];
        if (range.length == 0) {
            res = NO;
            break;
        }
        i++;
    }
    return res;
}

当然还可以将键盘设置为
textField.keyboardType = UIKeyboardTypeNumberPad;

4.设置UITextView之间的行间距,上下左右间距

行间距:
-(void)textViewDidChange:(UITextView *)textView
{
    //    textview 改变字体的行间距
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.lineSpacing = 5;// 字体的行间距
    
    NSDictionary *attributes = @{
                                 NSFontAttributeName:[UIFont systemFontOfSize:12],
                                 NSParagraphStyleAttributeName:paragraphStyle,
                                 NSForegroundColorAttributeName : XWColor(140, 140, 140)
                                 };
    textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];
    
}

上下左右间距:
textView.textContainerInset = UIEdgeInsetsMake(7, 7, 7, 7);