先前已寫過[iOS] 列出資料夾裡的檔案名稱 (List Contents of Directory),然而現在想要以最後修改時間列出檔案名稱 (List Contents of Directory By Last Modification Date),直接來看程式碼:
/**
Theme: List Contents of Directory By Last Modification Date
IDE: Xcode 9
Language: Objective C
Date: 107/08/02
Author: HappyMan
Blog: https://cg2010studio.com/
*/
+(NSArray *)listFileAtPathSortedByModificationDate:(NSString *)folderPath
{
NSError* error = nil;
NSArray* filesArray = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:&error];
if(error != nil) {
NSLog(@"Error in reading files: %@", [error localizedDescription]);
return @[];
}
// sort by creation date
NSMutableArray* filesAndProperties = [NSMutableArray arrayWithCapacity:[filesArray count]];
for(NSString* file in filesArray) {
NSString* filePath = [folderPath stringByAppendingPathComponent:file];
NSDictionary* properties = [[NSFileManager defaultManager]
attributesOfItemAtPath:filePath
error:&error];
NSDate* modDate = [properties objectForKey:NSFileModificationDate];
if(error == nil)
{
[filesAndProperties addObject:[NSDictionary dictionaryWithObjectsAndKeys:
file, @"fileName",
modDate, @"lastModificationDate",
nil]];
}
}
// sort using a block
// order inverted as we want latest date first
NSArray* sortedFiles = [filesAndProperties sortedArrayUsingComparator:
^(id path1, id path2)
{
// compare
NSComparisonResult comp = [[path1 objectForKey:@"lastModificationDate"] compare:
[path2 objectForKey:@"lastModificationDate"]];
// invert ordering
if (comp == NSOrderedDescending) {
comp = NSOrderedAscending;
}
else if(comp == NSOrderedAscending){
comp = NSOrderedDescending;
}
return comp;
}];
return sortedFiles;
}
以我的範例取得:
<__NSArrayI 0x137459190>(
{
fileName = “2018-08-02 10:17:20~2018-08-02 10:19:20.ecg";
lastModificationDate = “2018-08-02 02:19:24 +0000″;
},
{
fileName = “2018-08-02 10:11:32~2018-08-02 10:13:32.ecg";
lastModificationDate = “2018-08-02 02:14:48 +0000″;
},
{
fileName = “2018-08-02 10:09:28~2018-08-02 10:11:28.ecg";
lastModificationDate = “2018-08-02 02:11:31 +0000″;
},
{
fileName = “2018-08-02 10:06:47~2018-08-02 10:08:47.ecg";
lastModificationDate = “2018-08-02 02:08:50 +0000″;
},
{
fileName = “2018-08-02 09:02:28~2018-08-02 09:04:28.ecg";
lastModificationDate = “2018-08-02 01:04:30 +0000″;
},
{
fileName = “2018-07-31 23:40:03~2018-07-31 23:42:03.ecg";
lastModificationDate = “2018-07-31 15:42:07 +0000″;
},
{
fileName = “2018-07-31 14:43:38~2018-07-31 14:45:38.ecg";
lastModificationDate = “2018-07-31 06:45:40 +0000″;
},
{
fileName = “2018-07-31 14:40:58~2018-07-31 14:42:58.ecg";
lastModificationDate = “2018-07-31 06:43:01 +0000″;
}
)
參考:Get directory contents in date modified order。
HappyMan・迴響