遍历
- for( id *obj in array )
- enumerateObjectsUsingBlock:^(){}
- NSEnumerator *
排序
- NSArray /
- NSArray< NSDictionary * > /
- NSArray< ObjectType *>
不同的模式下,根据自己 ModelType 选择自定义或者系统排序处理;
< 1 >
[array1 sortedArrayUsingComparator:^NSComparisonResult(id _Nonnull obj1, id _Nonnull obj2) {
return [obj1 compare:obj2];
}];
< 2 >
NSSortStable 串行操作稳定效率偏低;NSSortConcurrent 并行操作效率高,适合排序大规模数据;
排序结果无异议!!!
[array2 sortedArrayWithOptions:NSSortStable usingComparator:^NSComparisonResult(id obj1, id obj2){
//sort in id-type
int ,string ...
}];
< 3 > 都是自定义不同的类型对比方法来进行排序;
sortedArrayUsingFunction
sortedArrayUsingSelector
< 4 > NSSortDescriptor
NSSortDescriptor *brandDescriptor = [[NSSortDescriptor alloc] initWithKey:@"xxx" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObject:brandDescriptor];
self.AllModelArray = [MyModelArray sortedArrayUsingDescriptors:sortDescriptors];
objectType 是字典或者自定义的Model,因为对于配置等处理结果都是无序的列表;
所以需要根据属性类型进行排序处理。<phoneNumber,country> 等;
More ->Search
NSPredicate
NSPredicate *filterPredicate = [NSPredicate predicateWithFormat:@"name beginswith[c] %@", filterString];
self.visibleResults = [self.AllModelArray filteredArrayUsingPredicate:filterPredicate];
.........