ios model字典 NSArray NSDictionary小结

摘要: ios model字典 NSArray NSDictionary小结

ios model字典

#import <Foundation/Foundation.h>

@interface AdObject : NSObject
/// 广告ID
@property (strong,nonatomic) NSString *adID;
/// 广告图片的地址
@property (strong,nonatomic) NSString *imagePath;
/// 广告标题
@property (strong,nonatomic) NSString *adTitle;

/*!
*  @brief  自定义初始化方法
*  @param dict 存放 HPAdObject 内容的字典
*  @return 当前类的一个实体
*/
- (id)initWithDictionary:(NSDictionary*)dict;
@end

实现

@implementation AdObject
- (id)initWithDictionary:(NSDictionary*)dict
{
if (self = [super init])
{
_adID = dict[@"id"];
_imagePath = dict[@"img"];
_adTitle = dict[@"title"];
}
return self;
}
@end

引用
AdObject *obj = [[AdObject alloc]initWithDictionary:dictItem];

kvc

@implementation AdObject
+ (instancetype)carGroupWithDict:(NSDictionary *)dict
{
AdObject *cg = [[self alloc] init];
[cg setValuesForKeysWithDictionary:dict];
return cg;
}
@end

引用
AdObject *cg = [AdObject initWithDictionary:dict]; //alloc也给封装了，

获取本地文件

NSArray *tmp = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"cars_simple" ofType:@"plist"]];

NSArray使用小结

//类方法数组创建
NSArray *array1 = [NSArray arrayWithObject:@"obj"];
NSArray *array2 = [NSArray arrayWithObjects:@"obj1", @"obj2", @"obj3", nil];
NSArray *array3 = [NSArray arrayWithArray:array2];

//实例方法创建数组
NSArray *array4 = [[NSArray alloc] initWithObjects:@"AAA", @"bbb", nil];

//数组个数
NSLog(@"array3 count :%d", [array3 count]);

//访问元素
NSLog(@"obj at index :%@", [array2 objectAtIndex:2]);

//是否包含指定对象
NSLog(@"isContains :%d", [array5 containsObject:@"obj2"]);

//查找某个对象所在索引
NSLog(@"indexOfObject :%d",[array5 indexOfObject:@"obj3"]);

//最后一个元素
NSLog(@"lastObejct :%@", [array5 lastObject]);

//遍历数组
for (id element in array5) {
NSLog(@"element :%@", element);
}

NSMutableArray;

NSMutableArray *MutableArray = ［NSMutableArray alloc] init];

[mutableArray addObject:@"000"];

//插入元素
[mutableArray insertObject:@"ccc" atIndex:0];

//移除指定元素
[mutableArray removeObject:@"ccc"];

//移除指定下标元素
[mutableArray removeObjectAtIndex:0];

//移除最后一个元素
[mutableArray removeLastObject];

//添加数组
[mutableArray addObjectsFromArray:array5];

//移除指定数组中的内容
[mutableArray removeObjectsInArray:array2];

//指定索引替换对象
[mutableArray replaceObjectAtIndex:0 withObject:@"==="];

//删除全部对象
[mutableArray removeAllObjects];

NSDictionary

//创建多个字典
NSDictionary *dic2 = [NSDictionary dictionaryWithObjectsAndKeys:
@"value1", @"key1",
@"value2", @"key2",
@"value3", @"key3",
@"value4", @"key4",
nil];

//根据key获取value
NSLog(@"key3 value :%@", [dic3 objectForKey:@"key3"]);

//获取字典数量
NSLog(@"dic count :%d", dic3.count);

//所有的键集合
NSArray *keys = [dic3 allKeys];

//所有值集合
NSArray *values = [dic3 allValues];

NSMutableDictionary;

NSMutableDictionary *mutableDic = [[NSMutableDictionary alloc] init];

//添加现有的字典数据
[mutableDic addEntriesFromDictionary:dic3];

//添加新的键值对象
[mutableDic setValue:@"set1" forKey:@"setKey1"];

//以新的字典数据覆盖旧的字典数据
[mutableDic setDictionary:dic2];

//根据key删除value
[mutableDic removeObjectForKey:@"key1"];

//快速遍历
for(id key in mutableDic) {
NSLog(@"key :%@  value :%@", key, [mutableDic objectForKey:key]);
}

//枚举遍历
NSEnumerator *enumerator = [mutableDic keyEnumerator];
id key = [enumerator nextObject];
while (key) {
NSLog(@"enumerator :%@", [mutableDic objectForKey:key]);
key = [enumerator nextObject];
}

//根据key数组删除元素
[mutableDic removeObjectsForKeys:keys];

//删除所有元素
[mutableDic removeAllObjects];