将文本输入边界限制在 iOS

Question

我正在为我的公司开发一个应用程序，但我不是 obj-C 编程语言方面的专家。我试图在互联网上找到一些答案，但根本没有成功。问题的解决方法可能很简单，但我无法解决。

我想限制文本使其适合文本框。现在正在发生的事情是，当我开始打字时，它永远在第一行流动，并且当它到达框边界时不会改变下降到第二行。

    otherdetails = [[UITextField alloc] initWithFrame:otherdetailsf];
    otherdetails.text = otherdetailstxt;
    [otherdetails.layer setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
    [otherdetails.layer setBorderWidth:2.0];
    otherdetails.layer.cornerRadius = 5;
    otherdetails.clipsToBounds = YES;
    otherdetails.delegate = self;
    otherdetails.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;
    otherdetails.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

这就是我在文本字段中键入大量内容时发生的情况....

我该如何解决这个问题？

谢谢！！

Answer 1

如果您需要在文本到达行尾时支持多行文本，请使用 TextView 而不是文本字段。

来自文档：

The UITextView class implements the behavior for a scrollable, multiline text region. The class supports the display of text using custom style information and also supports text editing. You typically use a text view to display multiple lines of text, such as when displaying the body of a large text document.

所以你的代码应该是：

 otherDetails=[[UITextView alloc]initWithFrame:otherdetailsf];
    otherDetails.text=@"";
    [otherDetails.layer setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
    [otherDetails.layer setBorderWidth:2.0];
    otherDetails.layer.cornerRadius = 5;
    otherDetails.clipsToBounds = YES;
    otherDetails.delegate = self;

    // otherDetails.contentMode=UIControlContentVerticalAlignmentTop;

Answer 2

试试这个代码：

在viewcontroller.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITextViewDelegate>
@property (strong,nonatomic)IBOutlet UITextView *mytextview;

@end

在viewcontroller.m

    #import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize mytextview;
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
-(void)addTextView
{

    [mytextview setText:@"Lorem ipsum dolor sit er elit lamet"];
    mytextview.delegate = self;
     [self.view addSubview:mytextview];

    mytextview.delegate = self;

}

    -(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:
    (NSRange)range replacementText:(NSString *)text{
        if ([text isEqualToString:@"\n"]) {
            [textView resignFirstResponder];
        }
        return YES;}

-(void)textViewDidBeginEditing:(UITextView *)textView{
    NSLog(@"Did begin editing");
}
-(void)textViewDidChange:(UITextView *)textView{
    NSLog(@"Did Change");

}
-(void)textViewDidEndEditing:(UITextView *)textView{
    NSLog(@"Did End editing");

}
-(BOOL)textViewShouldEndEditing:(UITextView *)textView{
    [textView resignFirstResponder];
    return YES;
}
@end

将文本输入边界限制在 iOS

Limit the text input boundaries on iOS

objective-c

uitextfield

ios