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[IOS开发教程] NSStringCompareOptions

发表于 2017-1-11 19:13:41

typedefNS_OPTIONS(NSUInteger, NSStringCompareOptions) {

NSCaseInsensitiveSearch = 1, //不区分大小写比较

NSLiteralSearch = 2, //逐字节比较 区分大小写

NSBackwardsSearch = 4, //从字符串末尾开始搜索

NSAnchoredSearch = 8, //搜索限制范围的字符串

NSNumericSearch = 64, //按照字符串里的数字为依据,算出顺序。例如 Foo2.txt < Foo7.txt < Foo25.txt

NSDiacriticInsensitiveSearchNS_ENUM_AVAILABLE(10_5, 2_0) = 128,//忽略 "-" 符号的比较

NSWidthInsensitiveSearchNS_ENUM_AVAILABLE(10_5, 2_0) = 256,//忽略字符串的长度,比较出结果

NSForcedOrderingSearchNS_ENUM_AVAILABLE(10_5, 2_0) = 512,//忽略不区分大小写比较的选项,并强制返回 NSOrderedAscending 或者 NSOrderedDescending

NSRegularExpressionSearchNS_ENUM_AVAILABLE(10_7, 3_2) = 1024 //只能应用于 rangeOfString:..., stringByReplacingOccurrencesOfString:...和 replaceOccurrencesOfString:... 方法。使用通用兼容的比较方法,如果设置此项,可以去掉 NSCaseInsensitiveSearch 和 NSAnchoredSearch

};

NSArray *stringsArray = [NSArrayarrayWithObjects:

@"string 10",

@"String 1",

@"string 120",

@"String 1100",

@"String 02000",nil];

NSStringCompareOptions comparisonOptions =NSCaseInsensitiveSearch |NSNumericSearch|NSWidthInsensitiveSearch |NSForcedOrderingSearch;

NSLocale *currentLocale = [NSLocalecurrentLocale];

NSComparator finderSortBlock = ^(id string1,id string2) {

NSRange string1Range =NSMakeRange(0, [string1length]);

return[string1compare:string2options:comparisonOptionsrange:string1Rangelocale:currentLocale];

};

NSArray *finderSortArray = [stringsArraysortedArrayUsingComparator:finderSortBlock];

NSLog(@"finderSortArray: %@", finderSortArray);

finderSortArray: (

"String 1",

"string 10",

"string 120",

"String 1100",

"String 02000"

)



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