将两个NSarray转换为NSString

NSArray *array1 = @[@"Hello", @"World"];
NSArray *array2 = @[@"Foo", @"Bar"];

NSString *string1 = [array1 componentsJoinedByString:@" "];
NSString *string2 = [array2 componentsJoinedByString:@", "];

NSLog(@"%@", string1); // 输出：Hello World
NSLog(@"%@", string2); // 输出：Foo, Bar

NSArray *array1 = @[@"Hello", @"World"];
NSArray *array2 = @[@"Foo", @"Bar"];

NSMutableString *string1 = [NSMutableString string];
NSMutableString *string2 = [NSMutableString string];

for (NSString *str in array1) {
    [string1 appendString:str];
    [string1 appendString:@" "];
}

for (NSString *str in array2) {
    [string2 appendString:str];
    [string2 appendString:@", "];
}

NSLog(@"%@", string1); // 输出：Hello World
NSLog(@"%@", string2); // 输出：Foo, Bar