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.有没有与这个Ruby数组方法相同的东西？

>> 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该数组的字符串表示形式.

Answer 2

你正在寻找的方法是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课程参考:

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