iOS 内存泄漏检测 -MLeaksFinder

MLeaksFinder

直接CocoaPods导入MLeaksFinder。

pod 'MLeaksFinder'

Pods 目录成功导入 FBRetainCycleDetector 和MLeaksFinder 之后无需修改任何程序代码 在模拟器 或真机上操作程序即可,

--代码如下

//ViewController.m
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    SecondViewController *secondVC = [[SecondViewController alloc]init];
    [self.navigationController pushViewController:secondVC animated:YES];
}
//SecondViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.view.backgroundColor = [UIColor redColor];
    UIBarButtonItem *leftBtn =[[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:self action:@selector(mySiteBack)];
 
    self.navigationItem.leftBarButtonItem = leftBtn;
    
    self.selected = ^(NSString *second){
        _second =@"2";
    };
}
#pragma mark--返回按钮--
- (void)mySiteBack{
    [self.navigationController popViewControllerAnimated:YES] ;
}

//点击返回

MLeaksFinder 提示没有走dealloc的页面存在可能内存泄漏

IMG_0892.PNG

点击 Retain Cycle 由FBRetainCycleDetector 检测出引起循环引用的属性或对象

IMG_0893.PNG

__weak修饰解决循环引用

 __weak typeof(self)Myself = self;
    self.selected = ^(NSString *second){
      Myself.second =@"2";
    };

__block修饰并不能避免循环引用

  __block typeof(self)Myself = self;

  self.selected = ^(NSString *second){
      Myself.second =@"2";
    };

结果如下

IMG_0895.PNG IMG_0896.PNG

SecondViewController 并没有走dealloc方法
"http://www.jianshu.com/p/d73772dc36a8"__block与__weak的真正区别