关于表格的排序是使用了NSComparisonResult这个方法，很简单的，只要自己定义几个方法，就可以了
代码：
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| @interface NSString (sortingExtension)
@end
@implementation NSString (sortingExtension)
- (NSComparisonResult) reverseCompare: (NSString *) aString
{
return -1 * [self caseInsensitiveCompare:aString];
}
- (NSComparisonResult) lengthCompare: (NSString *) aString
{
if (self.length == aString.length) return NSOrderedSame;
if (self.length > aString.length) return NSOrderedDescending;
return NSOrderedAscending;
}
@end
|
自己写个方法，然后封装到里面就好了,关于NSString (sortingExtension)这个名字，没研究出啥道道来，只是觉得奇怪
我迫于喜欢IOS5的storyboard，于是此篇也是用了storyboard
SortTableViewController.h
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|
#import <UIKit/UIKit.h>
#define COOKBOOK_PURPLE_COLOR [UIColor colorWithRed:0.20392f green:0.19607f blue:0.61176f alpha:1.0f]
#define BARBUTTON(TITLE, SELECTOR) [[[UIBarButtonItem alloc] initWithTitle:TITLE style:UIBarButtonItemStylePlain target:self action:SELECTOR] autorelease]
#define SYSBARBUTTON(ITEM, SELECTOR) [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:ITEM target:self action:SELECTOR] autorelease]
#define CRAYON_NAME(CRAYON) [[CRAYON componentsSeparatedByString:@"#"] objectAtIndex:0]
#define CRAYON_COLOR(CRAYON) [self getColor:[[CRAYON componentsSeparatedByString:@"#"] lastObject]]
@interface NSString (sortingExtensionFF)
@end
@implementation NSString (sortingExtensionFF)
- (NSComparisonResult) reverseCompare: (NSString *) aString
{
return -1 * [self caseInsensitiveCompare:aString];
}
- (NSComparisonResult) lengthCompare: (NSString *) aString
{
if (self.length == aString.length) return NSOrderedSame;
if (self.length > aString.length) return NSOrderedDescending;
return NSOrderedAscending;
}
@end
@interface SortTableViewController : UIViewController<UITableViewDataSource, UITableViewDelegate>
@property (strong, nonatomic) IBOutlet UITableView *tableView;
@property (retain) NSArray *items;
@end
|
SortTableViewController.m
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|
#import "SortTableViewController.h"
@interface SortTableViewController ()
@end
@implementation SortTableViewController
@synthesize items;
@synthesize tableView;
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.tintColor = COOKBOOK_PURPLE_COLOR;
self.tableView.delegate = self;
self.tableView.dataSource = self;
NSError *error;
NSString *pathname = [[NSBundle mainBundle] pathForResource:@"content" ofType:@"text"];
self.items = [[NSString stringWithContentsOfFile:pathname
encoding:NSUTF8StringEncoding
error:&error] componentsSeparatedByString:@"\n"];
UISegmentedControl *seg = [[UISegmentedControl alloc] initWithItems:[@"Ascending Descending Length" componentsSeparatedByString:@" "]];
seg.segmentedControlStyle = UISegmentedControlStyleBar;
seg.selectedSegmentIndex = 0;
[seg addTarget:self action:@selector(updateSort:) forControlEvents:UIControlEventValueChanged];
self.navigationItem.titleView = seg;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - UITableViewCell Method
- (NSInteger)numberOfSectionsInTableView:(UITableView *)aTableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section
{
return items.count;
}
- (UITableViewCell *)tableView:(UITableView *)tView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCellStyle style = UITableViewCellStyleDefault;
UITableViewCell *cell = [tView dequeueReusableCellWithIdentifier:@"BaseCell"];
if (!cell) cell = [[UITableViewCell alloc] initWithStyle:style reuseIdentifier:@"BaseCell"];
NSString *crayon = [items objectAtIndex:indexPath.row];
cell.textLabel.text = CRAYON_NAME(crayon);
if (![CRAYON_NAME(crayon) hasPrefix:@"White"])
cell.textLabel.textColor = CRAYON_COLOR(crayon);
else
cell.textLabel.textColor = [UIColor blackColor];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *crayon = [self.items objectAtIndex:indexPath.row];
self.navigationController.navigationBar.tintColor = CRAYON_COLOR(crayon);
}
- (void) updateSort: (UISegmentedControl *) seg
{
if (seg.selectedSegmentIndex == 0)
self.items = [self.items sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
else if (seg.selectedSegmentIndex == 1)
self.items = [self.items sortedArrayUsingSelector:@selector(reverseCompare:)];
else if (seg.selectedSegmentIndex == 2)
self.items = [self.items sortedArrayUsingSelector:@selector(lengthCompare:)];
[self.tableView reloadData];
}
- (UIColor *) getColor: (NSString *) hexColor
{
unsigned int red, green, blue;
NSRange range;
range.length = 2;
range.location = 0;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&red];
range.location = 2;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&green];
range.location = 4;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&blue];
return [UIColor colorWithRed:(float)(red/255.0f) green:(float)(green/255.0f) blue:(float)(blue/255.0f) alpha:1.0f];
}
@end
|
以上代码绝对支持ARC,时代是新的，代码的创新，跟着创新走吧，别烦恼更新太快，为了项目的最新，为了能够展示更好的项目，更新并不是什么坏事。
