完全來自于 iOS 多線程安全與可變字典?的學習

基本相同，舉一反三

直接上樣例代碼

是我參照網上，根據當前業務需求改的。

其實好多人在這里喜歡用類別處理。我個人覺得用類別 極其容易和普通方法混淆，所以為了降低耦合度，增強代碼理解性和可讀性。這里單獨創建類挺好的。用時候使用這個自定義的安全數組就好了。

// MensesTracker // // Created by HF on 2018/6/7. // Copyright ? 2018年 huofar. All rights reserved. // #import <Foundation/Foundation.h>@interface SyncMutableArray : NSObject//只讀 - (NSMutableArray *)safeArray;//判斷是否包含對象 - (BOOL)containsObject:(id)anObject;//集合元素數量 - (NSUInteger)count;//獲取元素 - (id)objectAtIndex:(NSUInteger)index; //枚舉元素 - (NSEnumerator *)objectEnumerator; //插入 - (void)insertObject:(id)anObject atIndex:(NSUInteger)index; //插入 - (void)addObject:(id)anObject; //移除 - (void)removeObjectAtIndex:(NSUInteger)index; //移除 - (void)removeObject:(id)anObject; //移除 - (void)removeLastObject; //替換 - (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)anObject; //獲取索引 - (NSUInteger)indexOfObject:(id)anObject;@end // // SyncMutableArray.m // MensesTracker // // Created by HF on 2018/6/7. // Copyright ? 2018年 huofar. All rights reserved. // #import "SyncMutableArray.h"@interface SyncMutableArray ()@property (nonatomic, strong) dispatch_queue_t syncQueue; @property (nonatomic, strong) NSMutableArray* array;@end@implementation SyncMutableArray#pragma mark - init 方法 - (instancetype)initCommon {self = [super init];if (self) {//%p 以16進制的形式輸出內存地址，附加前綴0xNSString* uuid = [NSString stringWithFormat:@"com.huofar.array_%p", self];//注意：_syncQueue是并行隊列_syncQueue = dispatch_queue_create([uuid UTF8String], DISPATCH_QUEUE_CONCURRENT);}return self; }- (instancetype)init {self = [self initCommon];if (self) {_array = [NSMutableArray array];}return self; }//其他init方法略 #pragma mark - 數據操作方法 (凡涉及更改數組中元素的操作，使用異步派發+柵欄塊；讀取數據使用 同步派發+并行隊列)- (NSMutableArray *)safeArray {__block NSMutableArray *safeArray;dispatch_sync(_syncQueue, ^{safeArray = _array;});return safeArray; }- (BOOL)containsObject:(id)anObject {__block BOOL isExist = NO;dispatch_sync(_syncQueue, ^{isExist = [_array containsObject:anObject];});return isExist; }- (NSUInteger)count {__block NSUInteger count;dispatch_sync(_syncQueue, ^{count = _array.count;});return count; }- (id)objectAtIndex:(NSUInteger)index {__block id obj;dispatch_sync(_syncQueue, ^{if (index < [_array count]) {obj = _array[index];}});return obj; }- (NSEnumerator *)objectEnumerator {__block NSEnumerator *enu;dispatch_sync(_syncQueue, ^{enu = [_array objectEnumerator];});return enu; }- (void)insertObject:(id)anObject atIndex:(NSUInteger)index {dispatch_barrier_async(_syncQueue, ^{if (anObject && index < [_array count]) {[_array insertObject:anObject atIndex:index];}}); }- (void)addObject:(id)anObject {dispatch_barrier_async(_syncQueue, ^{if(anObject){[_array addObject:anObject];}}); }- (void)removeObjectAtIndex:(NSUInteger)index {dispatch_barrier_async(_syncQueue, ^{if (index < [_array count]) {[_array removeObjectAtIndex:index];}}); }- (void)removeObject:(id)anObject {dispatch_barrier_async(_syncQueue, ^{[_array removeObject:anObject];//外邊自己判斷合法性 }); }- (void)removeLastObject {dispatch_barrier_async(_syncQueue, ^{[_array removeLastObject];}); }- (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)anObject {dispatch_barrier_async(_syncQueue, ^{if (anObject && index < [_array count]) {[_array replaceObjectAtIndex:index withObject:anObject];}}); }- (NSUInteger)indexOfObject:(id)anObject {__block NSUInteger index = NSNotFound;dispatch_sync(_syncQueue, ^{for (int i = 0; i < [_array count]; i ++) {if ([_array objectAtIndex:i] == anObject) {index = i;break;}}});return index; }- (void)dealloc {if (_syncQueue) {_syncQueue = NULL;} }@end

?

參考

1.?https://www.aliyun.com/jiaocheng/354967.html

2.https://blog.csdn.net/zhang522802884/article/details/76728902

轉載于:https://www.cnblogs.com/someonelikeyou/p/9151688.html

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