- // 实例化对象的头文件
-
@property (nonatomic, strong)NSString *name;
@property (nonatomic, assign)NSString *sex;
@property (nonatomic, assign)NSInteger tel;
@property (nonatomic, assign)NSInteger qq;- (Member *)initWithDic:(NSDictionary *)dic;
+ (Member *)memberWithDic:(NSDictionary *)dic; - // 构造函数的实现
- (Member *)initWithDic:(NSDictionary *)dic
{
if (self = [super init])
{
_name = dic[@"name"];
_sex = dic[@"sex"];
_tel = [dic[@"tel"] integerValue];
_qq = [dic[@"qq"] integerValue];
}
return self;
}
+ (Member *)memberWithDic:(NSDictionary *)dic
{
return [[self alloc] initWithDic:dic];
}
- (NSString *)description
{
return [NSString stringWithFormat:@"name = %@, sex = %@, qq = %lu, tel = %lu", _name, _sex, _qq, _tel];
}
- // 获取数据源：实例化plist文件
// 不能使用NSBundle获取路径
NSArray *arrData = [NSArray arrayWithContentsOfFile:@"/Users/Mu/Desktop/谓词和正则表达式/谓词和正则表达式/iOSclass(2).plist"];
// 集合存储所有实例化对象：将plist实例化
//（模型化）：取对象的属性进行判断，操作集合和集
NSMutableArray *arrMember = [NSMutableArray array];
for (NSArray *arrGroup in arrData)
{
for (NSDictionary *dicMember in arrGroup)
{
[arrMember addObject:[[Member alloc] initWithDic:dicMember]];
}
}
// 字符串需要使用单引号，语句大小写不敏感但属性属于变量大小写敏感
// 1.关系运算
// - 判断是否（包含判断对象是否相同）
NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"name == ‘燕江‘ and qq = 287143225"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate1])
{
NSLog(@"1.%@", mem);
}
// 2.关系运算
// <=等效=< ; !=和<> ; =>和>= ; !和not; 相等=和==，and和&& ; or和||
NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"NOT name.length <= 3"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate2])
{
NSLog(@"2.%@", mem);
}
// 3.CONTAINS
// - [c] 忽略大小写
// - [d] 忽略重音符号
// - [cd]既不区分大小写，也不区分发音符号
NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"name CONTAINS[cd]%@", @"燕"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate3])
{
NSLog(@"3.%@", mem);
}
// 4.BEGINSWITH和ENDSWITH：判断以声明开头或结尾
NSPredicate *predicate4 = [NSPredicate predicateWithFormat:@"name BEGINSWITH %@", @"燕"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate4])
{
NSLog(@"4.%@", mem);
}
NSPredicate *predicate5 = [NSPredicate predicateWithFormat:@"name ENDSWITH %@", @"燕"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate5])
{
NSLog(@"4.%@", mem);
}
// 5.通配符like
// - *代表一个或者多个或者是空
// - ?代表一个字符
NSPredicate *predicate6 = [NSPredicate predicateWithFormat:@"name like %@", @"*江"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate6])
{
NSLog(@"5.%@", mem);
}
// 6.关系运算
// - IN {}: 判断指定集合内对象是否存在（和多个使用OR连接等效）
NSPredicate *predicate7 = [NSPredicate predicateWithFormat:@"tel IN {18798812696, 18798815221}"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate7])
{
NSLog(@"6.%@", mem);
}
NSPredicate *predicate8 = [NSPredicate predicateWithFormat:@"name IN %@", @[@"燕江", @"刘木"]];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate8])
{
NSLog(@"6.%@", mem);
}
// 7.关系运算
// - BETWEEN {}: 指定范围，判断数据源是
NSPredicate *predicate9 = [NSPredicate predicateWithFormat:@"tel BETWEEN {18798812696, 18798815221}"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate9])
{
NSLog(@"7.%@", mem);
}
// 8.关系运算
// - NOT最常见的用法就是从一个数组中剔除另外一个数组的数据
// - 比起循环比较再加到新数组中，简单的不止一两点。
NSArray *arrayFilter = @[@"abc1", @"abc2"];
NSArray *arrayContent = @[@"a1", @"abc1", @"abc4", @"abc2"];
NSPredicate *thePredicate = [NSPredicate predicateWithFormat:@"NOT (SELF in %@)", arrayFilter];
NSLog(@"8.%@",[arrayContent filteredArrayUsingPredicate:thePredicate]);
// 9.block
// - 参数evaluatedObject表示数组成员
// - block必须返回YES或者NO，分别表示匹配还是不匹配
NSPredicate *predicate10 = [NSPredicate predicateWithBlock:^BOOL(id _Nonnull evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings)
{
Member *mem = (Member *)evaluatedObject;
if (mem.name.length>4)
{
return YES;
}else
{
return false;
}
}];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate10])
{
NSLog(@"9.%@", mem);
}
// 10.多重筛选
// - 如果需要匹配数个属性的筛选，用AND或者OR来串联显然有点麻烦
// - NSCompoundPredicate可以将多个NSPredicate对象的组合
// - 组合方式可以是AND或者OR以及NOT：调用类方法创建需要的参数是NSPredicate对象组成的集合
// 11.注意点
// - %K的K必须是大写: 使用%@ = %@会出现不能匹配
NSPredicate *predicate11 = [NSPredicate predicateWithFormat:@"%@ = %@", @"name", @"燕江"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate11])
{
NSLog(@"10.%@", mem);
}
NSPredicate *predicate12 = [NSPredicate predicateWithFormat:@"%K = %@", @"name", @"燕江"];
for (Member *mem in [arrMember filteredArrayUsingPredicate:predicate12])
{
NSLog(@"10.%@", mem);
}
// 12.正则表达式
NSPredicate *pri = [NSPredicate predicateWithFormat:@"SELF MATChES %@", @"^[1-9](\\d{5,11})"];
NSLog(@"12.判断是否是qq号：%s", ([pri evaluateWithObject:@"287143225"]==YES)?"YES":"NO");