Question

我有这段代码：

Ext.application({
  name: 'Fiddle',

  launch: function() {
    Ext.define('MyComboViewController', {
      extend: 'Ext.app.ViewController',
      alias: 'controller.mycombo',
      init: function() {
        this.getView().setStore(this.createStore());
      },
      createStore: function() {
        var store = Ext.create('Ext.data.Store', {
          fields: [
            {name: 'disp', type: 'string'},
            {name: 'val', type: 'int'}
          ],
          data: [
            {disp: 'One', val: 1},
            {disp: 'Two', val: 2},
            {disp: 'Three', val: 3},
            {disp: 'Four', val: 4},
            {disp: 'Five', val: 5}
          ],
          proxy: {
            type: 'memory'
          }
        });
        return store;
      }
    });

    Ext.define('MyCombo', {
      extend: 'Ext.form.field.ComboBox',
      xtype: 'myCombo',
      controller: 'mycombo',
      displayField: 'disp',
      valueField: 'val',
      labelAlign: 'top',
      validateOnChange: false,
      typeAhead: true,
      queryMode: 'local'
    });

    Ext.define('MyCombosContainerViewController', {
      extend: 'Ext.app.ViewController',
      alias: 'controller.mycomboscontainer',
      init: function() {
        var startCombo = this.lookupReference('startCombo');
        var endCombo = this.lookupReference('endCombo');
        startCombo.validator = Ext.bind(this.comboValidator, this, [startCombo, endCombo]);
        endCombo.validator = Ext.bind(this.comboValidator, this, [startCombo, endCombo]);
      },
      comboValidator: function(startCombo, endCombo) {
        return startCombo.getValue() < endCombo.getValue();
      },
      onSelectComboBox: function(combo) {
        var startCombo = this.lookupReference('startCombo');
        var endCombo = this.lookupReference('endCombo');
        startCombo.validate();
        endCombo.validate();
      }
    });

    Ext.define('MyCombosContainer', {
      extend: 'Ext.form.FieldContainer',
      controller: 'mycomboscontainer',
      layout: {
        type: 'hbox',
        align: 'stretch'
      },
      items: [{
        xtype: 'myCombo',
        reference: 'startCombo',
        fieldLabel: 'Start',
        listeners: {
          select: 'onSelectComboBox'
        }
      }, {
        xtype: 'myCombo',
        reference: 'endCombo',
        fieldLabel: 'End',
        listeners: {
          select: 'onSelectComboBox'
        }
      }]
    });

    Ext.create('MyCombosContainer', {
      renderTo: Ext.getBody()
    });
  }
});

我收到警告：

对象泄露：对象已分配并存储到＆＃39; imageRef＆＃39;不是稍后在此执行路径中引用，并且保留计数为+1

但我使用的是ARC，无法使用CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], rect); UIImage *outputimage = [UIImage imageWithCGImage:imageRef scale:image.scale orientation:UIImageOrientationUp];或release。如何解决这个问题？

Answer 1

只需添加此代码

即可

CGImageRelease(imageRef);

来自CGImageCreateWithImageInRect文档，

生成的图像保留对原始图像的引用，这意味着您可以在调用此函数后释放原始图像。

所以，你需要做的就是调用CGImageRelease使其保留count -1

iOS - CGImageRef潜在泄漏

1 个答案: