iOS 开发从 Array 生成特定分隔符隔开的 String

从一个String Array 或者 Object Array 生成字符串，使用特定的分隔符隔开，起始和末尾不需要分隔符，当传入的是对象的时候，需要指定Object 中 String 的 key 字符串，效果如下图所示：

直接看代码，只是备忘。

头文件

//
//  TGStringTool.h
//  DongKe
//
//  Created by VanJay on 2018/9/30.
//  Copyright © 2018 DongKe. All rights reserved.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface TGStringTool : NSObject
+ (NSString *)stringWithStringArr:(NSArray<NSString *> *)arr separatedStr:(NSString *)separatedStr;
+ (NSString *)stringWithArr:(NSArray<id> *)arr valueKey:(NSString *)key separatedStr:(NSString *)separatedStr;
@end

NS_ASSUME_NONNULL_END

实现文件

//
//  TGStringTool.m
//  DongKe
//
//  Created by VanJay on 2018/9/30.
//  Copyright © 2018 DongKe. All rights reserved.
//

#import "TGStringTool.h"

@implementation TGStringTool
+ (NSString *)stringWithStringArr:(NSArray<NSString *> *)arr separatedStr:(NSString *)separatedStr {
    NSMutableString *temp = [NSMutableString string];
    if (arr.count > 0) {
        [arr enumerateObjectsUsingBlock:^(NSString *_Nonnull str, NSUInteger idx, BOOL *_Nonnull stop) {
            if (str.length > 0) {
                [temp appendString:str];
                if (idx < arr.count - 1) {
                    [temp appendString:separatedStr];
                }
            }
        }];
    }

    return temp;
}

+ (NSString *)stringWithArr:(NSArray<id> *)arr valueKey:(NSString *)key separatedStr:(NSString *)separatedStr {
    NSMutableString *temp = [NSMutableString string];
    if (arr.count > 0) {
        [arr enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL *_Nonnull stop) {
            if ([obj respondsToSelector:NSSelectorFromString(key)]) {
                NSString *str = [obj valueForKey:key];
                if (str.length > 0) {
                    [temp appendString:str];
                    if (idx < arr.count - 1) {
                        [temp appendString:separatedStr];
                    }
                }
            }
        }];
    }
    return temp;
}
@end