objective-c - 在 Objective-C 中加入一个数组

Question

我正在寻找一种将 NSMutableArray 转换为字符串的方法。有什么可以与这个 Ruby 数组方法相提并论的吗？

>> array1 = [1, 2, 3]
>> array1.join(',')
=> "1,2,3"

干杯!

Answer 1

NSArray  *array1 = [NSArray arrayWithObjects:@"1", @"2", @"3", nil];
NSString *joinedString = [array1 componentsJoinedByString:@","];

componentsJoinedByString:将通过指定的字符串连接数组中的组件并返回数组的字符串表示形式。

Answer 2

您正在寻找的方法是componentsJoinedByString.

NSArray  *a = [NSArray arrayWithObjects:@"1", @"2", @"3", nil];//returns a pointer to NSArray
NSString *b = [a componentsJoinedByString:@","];//returns a pointer to NSString
NSLog(@"%@", b); // Will output 1,2,3

Answer 3

NSArray类参考：

NSArray *pathArray = [NSArray arrayWithObjects:@"here",
    @"be", @"dragons", nil];
NSLog(@"%@",
    [pathArray componentsJoinedByString:@" "]);