1、NSArray

NSArray不可變集合，不能添加新元素和刪除已有元素和替換元素

?

?

?

2、demo

Dog.h

#import <Foundation/Foundation.h> #ifndef Dog_h #define Dog_h@interface Dog : NSObject @property (nonatomic, strong) NSString *name; @property (nonatomic, assign) int age; -(id)initWithName:(NSString *)name age:(int)age; -(void)say:(NSString *)content; @end #endif /* Dog_h */

?

Dog.m

?

#import <Foundation/Foundation.h> #import "Dog.h"@implementation Dog @synthesize name; @synthesize age; -(id)initWithName:(NSString *)name age:(int)age {if (self = [super init]){self.name = name;self.age = age;}return self; }-(void)say:(NSString *)content {NSLog(@"%@ say %@", name, content); }-(BOOL)isEqual:(id)object {if (object == self)return YES;if ([object class] == Dog.class){Dog *dog = (Dog *)object;return [self.name isEqualToString:dog.name] && (self.age == dog.age);}return NO; } @end

?

?

?

main.m

int main(int argc, char * argv[]) {@autoreleasepool {NSArray *array = [NSArray arrayWithObjects:@"chenyu", @"hello", @"word", @"god", nil];NSLog(@"first data id %@", [array objectAtIndex:0]);NSLog(@"first data id %@", [array objectAtIndex:1]);NSLog(@"first data id %@", [array lastObject]);NSLog(@"@hello is %ld", [array indexOfObject:@"hello"]);array = [array arrayByAddingObject:@"chenzixuan"];for (int i = 0; i < array.count; ++i){NSLog(@"%@", [array objectAtIndex:i]);}NSArray *arr = [NSArray arrayWithObjects:[[Dog alloc] initWithName:@"chen" age:1], [[Dog alloc] initWithName:@"chenyu" age:1], [[Dog alloc] initWithName:@"chengongyu" age:1], nil];Dog *d = [[Dog alloc] initWithName:@"chenyu" age:1];NSInteger pos = [arr indexOfObject:d];NSLog(@"index is %ld", pos);[arr makeObjectsPerformSelector:@selector(say:) withObject:@"拜拜"];NSString *str = @"hello";[array enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {NSLog(@"正在處理第%ld個元素:%@", idx, obj);}];} }

?

?

?

3、結果

2018-07-15 21:17:44.447732+0800 cyTest[31047:9530812] first data id chenyu 2018-07-15 21:17:44.449642+0800 cyTest[31047:9530812] first data id hello 2018-07-15 21:17:44.450020+0800 cyTest[31047:9530812] first data id god 2018-07-15 21:17:44.450943+0800 cyTest[31047:9530812] @hello is 1 2018-07-15 21:17:44.451207+0800 cyTest[31047:9530812] chenyu 2018-07-15 21:17:44.451493+0800 cyTest[31047:9530812] hello 2018-07-15 21:17:44.451739+0800 cyTest[31047:9530812] word 2018-07-15 21:17:44.451986+0800 cyTest[31047:9530812] god 2018-07-15 21:17:44.452233+0800 cyTest[31047:9530812] chenzixuan 2018-07-15 21:17:44.453020+0800 cyTest[31047:9530812] index is 1 2018-07-15 21:17:44.453332+0800 cyTest[31047:9530812] chen say 拜拜 2018-07-15 21:17:44.453581+0800 cyTest[31047:9530812] chenyu say 拜拜 2018-07-15 21:17:44.453803+0800 cyTest[31047:9530812] chengongyu say 拜拜 2018-07-15 21:17:44.454188+0800 cyTest[31047:9530812] 正在處理第0個元素:chenyu 2018-07-15 21:17:44.454456+0800 cyTest[31047:9530812] 正在處理第1個元素:hello 2018-07-15 21:17:44.455253+0800 cyTest[31047:9530812] 正在處理第2個元素:word 2018-07-15 21:17:44.478747+0800 cyTest[31047:9530812] 正在處理第3個元素:god 2018-07-15 21:17:44.478861+0800 cyTest[31047:9530812] 正在處理第4個元素:chenzixuan

?

?

?

?

?

?

4、NSMutableArray

nsMutableArray可變數組，代表是一個集合元素可變的集合

一般有add開頭、 remove開頭、replace開頭、sort開頭的方法

?

?

?

?

?

5、測試Demo

NSMutableArray *muArray = [NSMutableArray arrayWithObjects:@"chen", @"yu", @"hello", @"word", nil];[muArray addObject:@"123"];[muArray removeObject:@"yu"];[muArray replaceObjectAtIndex:1 withObject:@"xx"];for (id ob in muArray) {NSLog(@"ob is %@", ob);}

?

?

?

?

6、結果

2018-07-18 22:02:57.498997+0800 cyTest[31429:12701122] ob is chen 2018-07-18 22:02:57.600036+0800 cyTest[31429:12701122] ob is xx 2018-07-18 22:02:57.600599+0800 cyTest[31429:12701122] ob is word 2018-07-18 22:02:57.600824+0800 cyTest[31429:12701122] ob is 123

?

?

?

?

總結

以上是生活随笔為你收集整理的IOS学习笔记十九NSArray和NSMutableArray的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。