Question

我有一个iPad应用程序在iPad（第一个型号）上崩溃，因为内存不足。

我创建一个名为RoadSectionView的自定义视图，这意味着一条道路，另一个名为CrossRoadView的自定义视图包含四个RoadSectionViews。

RoadSectionView.h：

#import "GestureView.h"

@interface RoadSectionView : GestureView <NSCopying,NSCoding>

@property (nonatomic, assign) CGPoint startPoint;       //手指触摸起始点
@property (nonatomic, assign) CGPoint endPoint;         //手指触摸终止点

@property (nonatomic, strong) UIImageView *startPointView;     //起始控制点
@property (nonatomic, strong) UIImageView *endPointView;       //终止控制点

@property (nonatomic)NSString *type;               //路段的类型
@property (nonatomic)NSString *roadName;           //路段名称

@property (nonatomic, assign)NSInteger roadWidth;            //路道宽，默认为350
@property (nonatomic, assign)NSInteger roadIslandWidth;      //中间路岛宽，默认为40
@property (nonatomic, assign)NSInteger upOrLeftLaneNum;      //上或左路段的路道数，默认为2
@property (nonatomic, assign)NSInteger downOrRightLaneNum;   //下或右路段的路道数，默认为2

@property (nonatomic) NSArray *startUpOrLeft;              //上或左起始点数组
@property (nonatomic) NSArray *startDownOrRight;           //下或右起始点数组
@property (nonatomic) NSArray *endUpOrLeft;                //上或左终止点数组
@property (nonatomic) NSArray *endDownOrRight;             //下或右终止点数组

- (void)drawView:(CGPoint)point1 :(CGPoint)point2;
- (void)addControlPoint:(CGPoint) start : (CGPoint) end;
- (id)initWithFrame:(CGRect)frame : (NSString *)name;

@end

这是CrossRoadView.h

#import "GestureView.h"
#import "RoadSectionView.h"

@interface CrossRoadView : GestureView<NSCopying,NSCoding>

@property (nonatomic) NSString *type;

@property (nonatomic, assign) CGPoint centerPoint;

@property (nonatomic, strong)RoadSectionView *leftRoad;
@property (nonatomic, strong)RoadSectionView *rightRoad;
@property (nonatomic, strong)RoadSectionView *upRoad;
@property (nonatomic, strong)RoadSectionView *downRoad;

- (void)drawView:(CGPoint)start;
- (id)initWithFrame:(CGRect)frame : (NSString *)name;
- (void)addControlPoint;
- (void)addDistanceLine;
- (void)drawConnectLines;

@end

GestureView.h文件：

#import <UIKit/UIKit.h>

@interface GestureView : UIImageView <UIGestureRecognizerDelegate,  UIPopoverControllerDelegate,NSCoding,NSCopying>

@property (nonatomic, retain) UIView *parentView;

@property  BOOL isPanEnable;
@property  BOOL isRotateEnable;
@property  BOOL isPinchEnable;

@property BOOL doesHaveTreelawn;

@property (nonatomic) CGPoint imagePoint;       //记录添加的view的在父视图中的起点
@property (nonatomic) CGFloat imageSize;        //记录放缩的倍数
@property (nonatomic) CGFloat imageRotation;    //记录旋转的角度
@property (nonatomic) CGPoint imageTranslate;   //记录平移的大小

@property (nonatomic, assign) CGPoint upContrlPoint;
@property (nonatomic, assign) CGPoint downContrlPoint;

@property (nonatomic, retain) UIPopoverController *popoverController;

- (void)handlePan:(UIPanGestureRecognizer *)recognizer;
- (void)handlePinch:(UIPinchGestureRecognizer *)recognizer;
- (void)handleRotate:(UIRotationGestureRecognizer *)recognizer;
- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer;

- (void)setGesture:(UIView *)parent : (BOOL)isPan : (BOOL)isPinch : (BOOL)isRotate;

@end

当我在rootView中添加几个RoadSectionView，而不是删除它们时，它工作正常，真正的内存没有增加。删除代码是

[self.canvasView.subviews makeObjectsPerformSelector: @selector(removeFromSuperview)];

但是当我在rootView中添加几个CrossRoadView时，我删除了它们，实际内存增加，因为我将它们保存到磁盘，canvasView将在打开文件时首先删除所有子视图，而不是我多次打开文件，应用程序崩溃了

你可以帮我!!非常感谢

Answer 1

您可能不需要为strong使用RoadSectionView属性，因为当您将它们添加为子视图时，超级视图（CrossRoadView）将保留这些属性。然后，当超级视图被摧毁时，它们将被释放。

尝试使用

@property (nonatomic, weak) RoadSectionView *leftRoad
...

删除包含少量子视图IOS（ARC）的自定义视图时实际内存增加

1 个答案: