iOS 编程（第四版）第八章初级练习习题。
//
//BNRItemsViewController.m
//Homepwner
//
//Created by David on 5/25/16.
//Copyright © 2016 David. All rights reserved.
//
#import"BNRItemsViewController.h"
#import"BNRItemStore.h"
#import"BNRItem.h"
@interfaceBNRItemsViewController()
@propertyNSMutableArray*arr1;
@propertyNSMutableArray*arr2;
@end
@implementationBNRItemsViewController
-(instancetype)init
{
self= [superinitWithStyle:UITableViewStylePlain];
if(self) {
for(inti =0; i <5; i++) {
[[BNRItemStoresharedStore]createItem];
}
}
returnself;
}
-(instancetype)initWithStyle:(UITableViewStyle)style
{
return[selfinit];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView*)tableView
{
return2;
}
- (NSString*)tableView:(UITableView*)tableView titleForHeaderInSection:(NSInteger)section
{
if(section ==0) {
return@"More than 50";
}elseif(section ==1) {
return@"Less and equal to 50";
}else{
returnnil;
}
}
- (NSInteger)tableView:(UITableView*)tableView
numberOfRowsInSection:(NSInteger)section
{
NSArray*all = [[BNRItemStoresharedStore]allItems];
self.arr1= [[NSMutableArrayalloc]init];
self.arr2= [[NSMutableArrayalloc]init];
for(BNRItem*iteminall) {
if(item.valueInDollars>50) {
[self.arr1addObject:item];
}else{
[self.arr2addObject:item];
}
}
if(section ==0) {
return[self.arr1count];
}else{
return[self.arr2count];
}
}
- (UITableViewCell*)tableView:(UITableView*)tableView
cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell*cell =
[tableViewdequeueReusableCellWithIdentifier:@"UITableViewCell"forIndexPath:indexPath];
NSUIntegerrow = indexPath.row;
NSUIntegersection = indexPath.section;
if(section ==0) {
BNRItem*item =self.arr1[row];
cell.textLabel.text= [itemdescription];
returncell;
}
if(section ==1) {
BNRItem*item = [self.arr2objectAtIndex:row];
cell.textLabel.text= [itemdescription];
returncell;
}
returnnil;
}
- (void)viewDidLoad
{
[superviewDidLoad];
[self.tableViewregisterClass:[UITableViewCellclass]forCellReuseIdentifier:@"UITableViewCell"];
}
@end