xcode 如何设置字符串值等于 UITextField？

How to set string value equal to UITextField?

提问by Guest

I'm trying to make it so you type in a number in a text field, then you press a button. A string is then equal to the text field and a label is then equal to the string. The problem is it crashes when i pres the button. What am I doing wrong?

我正在尝试让您在文本字段中输入一个数字，然后按下一个按钮。然后一个字符串等于文本字段，然后一个标签等于该字符串。问题是当我按下按钮时它会崩溃。我究竟做错了什么？

from the .h file:

从 .h 文件：

@interface TextGameViewController : UIViewController 
 {
   IBOutlet UITextField *input;
   IBOutlet UILabel *line11;
   NSString *l11;
 }
-(IBAction)button;

from the .m file:

从 .m 文件：

-(IBAction)button
 {
   [input resignFirstResponder];
   l11 = ([input.text stringValue]);
   line11.text = [[NSString alloc] initWithFormat:@"%2.f", l11];
 }

采纳答案by Ahmad Kayyali

l11 is already a NSString, change this line of code from:

l11 已经是一个NSString，将这行代码从：

l11 = ([input.text stringValue]);

To

到

l11 = input.text;