iOS 多安全執行緒 與可變數組

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完全來自於 iOS 多安全執行緒與可變字典 的學習

基本相同，舉一反三

直接上範例代碼

是我參照網上，根據當前業務需求改的。

其實好多人在這裡喜歡用類別處理。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。這裡單獨建立類挺好的。用時候使用這個自訂的安全陣列就好了。

//  MensesTracker////  Created by HF on 2018/6/7.//  Copyright ? 2018年 huofar. All rights reserved.//#import <Foundation/Foundation.h>@interface SyncMutableArray : NSObject//唯讀- (NSMutableArray *)safeArray;//判斷是否包含對象- (BOOL)containsObject:(id)anObject;//集合元素數量- (NSUInteger)count;//擷取元素- (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;//擷取索引- (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進位的形式輸出記憶體位址，附加首碼0x        NSString* uuid = [NSString stringWithFormat:@"com.huofar.array_%p", self];        //注意：_syncQueue是並行隊列        _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 - 資料操作方法 (凡涉及更改數組中元素的操作，使用非同步派發+柵欄塊；讀取資料使用 同步派發+並行隊列)- (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

2.76728902

iOS 多安全執行緒 與可變數組