在另一个文本字段下方添加文本字段以编程方式在ios中
问题描述:
在我的应用程序中,我想以编程方式将文本字段添加到另一个文本字段下方,如果需要点击一个按钮。我已经提供了两个textFields.if用户想要添加另一个文本框,他可以通过点击一个按钮来实现。我已经编写了代码来获取文本字段,但问题在于它与已设计的textField重叠。如何才能做到这一点。在另一个文本字段下方添加文本字段以编程方式在ios中
有没有什么办法可以让我得到已经设计好的textfield的x和y坐标,这样我就可以将新的textField放到相对于这些坐标的位置上。
答
该代码添加文本框,查看时动态按钮每次点击动作
ExampleViewController.h
#import <UIKit/UIKit.h>
@interface ExampleViewController :UIViewController<UITextFieldDelegate>
@property int positionY;
@property int fieldCount;
@property (strong,nonatomic) UIScrollView *scroll;
@end
ExampleViewController.m
#import "ExampleViewController.h"
@interface ExampleViewController()
@end
@implementation ExampleViewController
@synthesize positionY;
@synthesize fieldCount;
@synthesize scroll;
- (void)viewDidLoad {
[super viewDidLoad];
scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scroll.backgroundColor = [UIColor whiteColor];
[self.view addSubview:scroll];
UIButton *clickToCreateTextField = [[UIButton alloc] initWithFrame:CGRectMake(40, 80, self.view.frame.size.width-80, 75)];
[clickToCreateTextField setTitle:@"Create Text Field" forState:UIControlStateNormal];
[clickToCreateTextField addTarget:self action:@selector(clickedButton) forControlEvents:UIControlEventTouchUpInside];
[clickToCreateTextField setBackgroundColor:[UIColor blackColor]];
[scroll addSubview:clickToCreateTextField];
positionY = clickToCreateTextField.center.y;
fieldCount = 0;
// Do any additional setup after loading the view.
}
-(void) clickedButton{
//add text field programmitacally
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(40, positionY, self.view.frame.size.width-80, 75)];
textField.delegate = self;
//give a tag to determine the which textField tapped
textField.tag = fieldCount;
textField.placeholder = [NSString stringWithFormat:@"Your dynamically created textField: %d", fieldCount ];
[scroll addSubview:textField];
//check if the textFields bigger than view size set scroll size and offset
if (positionY>= self.view.frame.size.height) {
scroll.contentOffset = CGPointMake(0, positionY);
scroll.contentSize = CGSizeMake(scroll.frame.size.width, scroll.frame.size.height+positionY);
}
fieldCount++;
//increase the position with a blank place
positionY = positionY+textField.frame.size.height+20;
}
#pragma mark TextField Delegate Methods
-(void) textFieldDidBeginEditing:(UITextField *)textField{
//Do what ever you want
}
-(void) textFieldDidEndEditing:(UITextField *)textField{
[textField resignFirstResponder];
//do anything
}
-(BOOL) textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
-(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
您可以对此代码进行任何其他更改。 我认为这个例子解释你的答案。
希望它有帮助。
答
使用计数器并计算y这个计数器* texfield.frame.size.height。
首先,发布你的代码,让我们看看你正在谈论的问题。其次,是的,这是可能的,请谷歌UIView属性“框架”。 第三,你应该学习autoLayout,它的强硬但是长期来看是值得的 – 2015-04-02 12:47:07