【Foundation-10-2】#import Foundation/NSArray.h

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@interface NSArray (NSArrayCreation)

类方法

+ (instancetype)array;

+ (instancetype)arrayWithObject:(id)anObject;

+ (instancetype)arrayWithObjects:(const id [])objects count:(NSUInteger)cnt; // c 数组创建（阿西吧）

+ (instancetype)arrayWithObjects:(id)firstObj, ... NS_REQUIRES_NIL_TERMINATION;

+ (instancetype)arrayWithArray:(NSArray *)array;

<pre name="code" class="objc">#pragma mark - 类方法NSArray *arr = [NSArray array];NSArray *arr2 = [NSArray arrayWithObject:@"2"];NSArray *arr3 = [NSArray arrayWithObjects:@"1",@"2", nil];//以 c 的形式创建数组，arr4，取 testArr 中的前3个id (testArr)[10] = {@"1",@"2",@"3",@"4"};NSArray *arr4 = [NSArray arrayWithObjects:testArr count:3];NSArray *arr5 = [NSArray arrayWithArray:arr4];

实例方法

- (instancetype)initWithObjects:(id)firstObj, ... NS_REQUIRES_NIL_TERMINATION;

- (instancetype)initWithArray:(NSArray *)array;

- (instancetype)initWithArray:(NSArray *)array copyItems:(BOOL)flag;

<pre name="code" class="objc">#pragma mark - 实例方法NSArray *arr6 = [[NSArray alloc]initWithObjects:@"1",@"2", nil];NSArray *arr7 = [[NSArray alloc]initWithArray:arr6];NSArray *arr8 = [[NSArray alloc]initWithArray:arr6 copyItems:YES];

// 文件路径，url  获取

+ (NSArray *)arrayWithContentsOfFile:(NSString *)path;

+ (NSArray *)arrayWithContentsOfURL:(NSURL *)url;

- (NSArray *)initWithContentsOfFile:(NSString *)path;

- (NSArray *)initWithContentsOfURL:(NSURL *)url;

#pragma mark - 读取文件，数组//文件路径，获取数组NSString *path = [[NSBundle mainBundle]pathForResource:@"testArray" ofType:@"plist"];NSArray *arr9 = [NSArray arrayWithContentsOfFile:path];NSArray *arr91 = [[NSArray alloc]initWithContentsOfFile:path];//url 路径，获取数组NSURL *url = [NSURL URLWithString:@"?????"];NSArray *arr10 = [NSArray arrayWithContentsOfURL:url];NSArray *arr101 = [[NSArray alloc]initWithContentsOfURL:url];

@end

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