iphone - 在 ARC 上显示 UIKeyboard 时内存泄漏

Question

调用 UIKeyboard 时，会分配内存，而当 UIKeyboard 隐藏时，不会释放内存。如果是框架在缓存它，有没有办法清除它？这些代码是我用来创建 UITextField 以及我如何隐藏 UIKeyboard 的代码:

    #import <UIKit/UIKit.h>

    @interface SignInTextField : UITextField

    -(id)initWithIndexPath:(NSIndexPath*)indexPath;

    @end

    #import "SignInTextField.h"

    @implementation SignInTextField

    -(id)initWithIndexPath:(NSIndexPath*)indexPath{
        self = [super init];
        if (self) {
            if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
                // iPad
                self.frame = CGRectMake(110, 10, 600, 30);
            } else {
                self.frame = CGRectMake(110, 11, 150, 30);
            }

            self.tag = [indexPath row];
            self.returnKeyType = UIReturnKeyDone;
            self.autocapitalizationType = UITextAutocapitalizationTypeNone;
        }
        return self;
    }

    //SettingTextField
    SignInTextField *textField = [[SignInTextField alloc]initWithIndexPath:indexPath];
    textField.delegate = self;

    #pragma mark - Text Field CallBack
    -(void)textFieldDidBeginEditing:(UITextField *)textField{
        activeField = textField;
    }

    - (void)textFieldDidEndEditing:(UITextField *)textField {

        if(textField.tag == 0) temp_email = [NSString         stringWithFormat:@"%@",textField.text];
        if(textField.tag == 1) temp_password = [NSString stringWithFormat:@"%@",textField.text];
    }

    - (BOOL)textFieldShouldReturn:(UITextField *)textField {
        [textField resignFirstResponder];
        return YES;
   }

Answer 1

当您第一次打开键盘时，它会被 iOS 原生框架缓存。它由 UIKit 框架处理。

这不是内存泄漏。下次需要显示键盘时，应用程序将使用缓存的键盘。

如果内存需求变高， native 框架将在需要时释放缓存的 View 。应用程序仍然需要内存，框架将为此生成内存警告。