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NSString 字符串的排序 - NSString 字符串的排序 sortedArrayUsingComparator sortedArrayUsingSelector sortedArrayUsingDescriptors

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iOS NSString 创建和初始化 + (instancetype)string; + (instancetype)stringWithString:(NSString *)string; + (instancetype)stringWithCharacters:(const unichar *)characters length:(NSUI...

iOS NSString 替换字符串 - (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement options:(NSStringCompareOptions)options range:(NSRa...

iOS NSString 和 bool 相互转换 NSString *str1 = @'YES'; NSString *str2 = @'NO'; //ok NSLog(@'str1 = %d str2 = %d',[str1 boolValue],[str2 boolValue]); BOOL a = YES; BOOL b = NO; NSSt...

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