我有一个NSMutableArray
,其中包含大量QuickBlox自定义对象(QBCOCustomObject
类)。
当我的用户在文本字段中输入名称信息时,我想过滤我的tableview以根据他们的搜索显示结果。
以下是我如何从自定义类中获取用户的全名...
for (QBCOCustomObject *object in self.userArray) {
NSString *c = [object.fields[@"fullName"];
NSLog (@"%@", c);
}
在下面的方法中,我尝试设置谓词,但我很难找到谓词的正确格式。有人可以帮忙吗?
- (void)textFieldDidChange :(UITextField *)theTextField {
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(fullName CONTAINS[cd] %@)", self.searchBar.text];
self.userArray = [[self.userArray filteredArrayUsingPredicate:predicate] mutableCopy];
[self.tableView reloadData];
}
答案 0 :(得分:1)
以下是工作示例:
NSMutableArray *initialArray = [NSMutableArray array];
QBCOCustomObject *object1 = [QBCOCustomObject customObject];
object1.fields = [@{
@"fullName": @"Igor",
@"age": @(27)
} mutableCopy];
[initialArray addObject:object1];
//
QBCOCustomObject *object2 = [QBCOCustomObject customObject];
object2.fields = [@{
@"fullName": @"Bob",
@"age": @(27)
} mutableCopy];
[initialArray addObject:object2];
//
QBCOCustomObject *object3 = [QBCOCustomObject customObject];
object3.fields = [@{
@"fullName": @"Igorio",
@"age": @(27)
} mutableCopy];
[initialArray addObject:object3];
NSLog(@"initialArray: %@", initialArray);
NSPredicate *bPredicate = [NSPredicate predicateWithFormat:@"fields.fullName CONTAINS 'Igor'"];
NSArray *filteredArray = [initialArray filteredArrayUsingPredicate:bPredicate];
NSLog(@"filteredArray: %@", filteredArray);
它返回'Igor'和'Igorio'对象并跳过'Bob'
这是一个关于NSPredicate的好教程,有很好的例子: