问题描述
我想知道是否可以根据其中包含的数值对 NSStrings 的 NSArray 进行排序.基本上它是进程 ID 和进程名称的列表，我想根据进程 ID 对进程进行排序.数组如下所示:
I'm wondering if it is possible to sort an NSArray of NSStrings based on a number value contained within. Basically its a list of process ID's and process names, and I would like to sort the processes based on their process ID. The array looks like this :
"286 Google Chrome He",
"1209 ibtool",
"0 kernel_task",
"1 launchd",
"10 kextd",
"11 notifyd",
"12 diskarbitrationd",
"13 configd",
"14 syslogd",
"15 DirectoryService",
"16 distnoted",
"18 ntpd",
"22 SystemStarter",
"25 securityd",
"28 mds",
"29 mDNSResponder",
"30 loginwindow",
"31 KernelEventAgent",
"33 hidd",
"34 fseventsd",
"36 dynamic_pager",
"42 blued",
"43 autofsd",
"46 WDSmartWareD",
"47 WDDMService",
"61 coreservicesd",
"62 WindowServer",
"71 HWPortCfg",
"72 HWNetCfg",
"159 socketfilterfw",
"165 cvmsServ",
"177 coreaudiod",
"191 vmnet-bridge",
"196 vmnet-dhcpd",
"198 vmnet-netifup",
"200 vmnet-dhcpd",
"204 vmnet-natd",
"206 vmnet-netifup",
"220 launchd",
"224 Dock",
"225 SystemUIServer",
"226 Finder",
"228 pboard",
"229 fontd",
"240 UserEventAgent",
"247 AirPort Base Sta",
"252 iprint-listener",
"253 StatusMenu",
"254 Dropbox",
"271 dbfseventsd",
"275 Google Chrome",
"295 Google Chrome He",
"298 AppleSpell",
"634 Google Chrome He",
"696 Google Chrome He",
"730 Microsoft Word",
"733 Microsoft Databa",
"736 Microsoft AU Dae",
"1095 usbmuxd",
"1110 Xcode",
"1171 Interface Builde",
"1282 Interface Builde",
"1283 Interface Builde",
"1475 Google Chrome He",
"1531 Google Chrome He",
"1533 Google Chrome He",
"1681 Google Chrome He",
"1682 Google Chrome He",
"1686 Google Chrome He",
"1687 Google Chrome He",
"1692 Google Chrome He",
"1945 Google Chrome He",
"2088 Keynote",
"2268 Google Chrome He",
"2326 Google Chrome He",
"2481 Google Chrome He",
"2545 Google Chrome He",
"2596 Google Chrome He",
"2766 mdworker",
"2933 Google Chrome He",
"2963 iPhone Simulator",
"2967 SimulatorBridge",
"2970 lsd",
"2971 SpringBoard",
"2982 ocspd",
"2998 installd",
"3000 TableViewControl",
"3001 taskgated",
"3002 gdb-i386-apple-d"
非常感谢任何帮助！
推荐答案
是的，可以使用下面的 NSArray 实例方法:
Yes, you can use the following NSArray instance method:
- (NSArray *)sortedArrayUsingFunction:(NSInteger (*)(id, id, void *))comparator context:(void *)context
您需要定义一个带有三个参数的 int 函数:要比较的两个数组元素和一个上下文.它返回一个 NSComparisonResult(-1、0 或 1).例如:
You'll need to define an int function that takes three arguments: two array elements to compare, and a context. It returns a NSComparisonResult (-1, 0 or 1). For example:
NSInteger firstWordIntCompare(id stringLeft, id stringRight, void *context)
{
// Extract number from stringLeft and stringRight
NSArray *wordsLeft = [stringLeft componentsSeparatedByString:@" "];
NSArray *wordsRight = [stringRight componentsSeparatedByString:@" "];
NSString *firstWordLeft = wordsLeft.count ? [wordsLeft objectAtIndex:0] : nil;
NSString *firstWordRight = wordsRight.count ? [wordsRight objectAtIndex:0] : nil;
int intLeft = [firstWordLeft intValue];
int intRight = [firstWordRight intValue];
if (intLeft < intRight)
return NSOrderedAscending;
else if (intLeft > intRight)
return NSOrderedDescending;
else
return NSOrderedSame;
}
然后通过使用您的函数调用 NSArray 方法返回排序后的数组:
Then return the sorted array by calling the NSArray method with your function:
NSArray *sortedArray = [origArray sortedArrayUsingFunction:firstWordIntCompare context:NULL];
这篇关于如何按其中包含的数字对 NSStrings 数组进行排序?(按升序排列)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！