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];