ios開發之--NSString的操作

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1.截取字串

NSString*string =@"sdfsfsfsAdfsdf";string = [string substringToIndex:7];//截取掉下標7之後的字串NSLog(@"截取的值為：%@",string);[string substringFromIndex:2];//截取掉下標2之前的字串NSLog(@"截取的值為：%@",string);

2.匹配字串

NSString*string =@"sdfsfsfsAdfsdf";NSRangerange = [stringrangeOfString:@"f"];//匹配得到的下標NSLog(@"rang:%@",NSStringFromRange(range));string = [string substringWithRange:range];//截取範圍類的字串NSLog(@"截取的值為：%@",string);

3.分隔字串

NSString*string =@"sdfsfsfsAdfsdf";NSArray *array = [string componentsSeparatedByString:@"A"]; //從字元A中分隔成2個元素的數組NSLog(@"array:%@",array); //結果是adfsfsfs和dfsdf1.截取字串NSString*string =@"sdfsfsfsAdfsdf";string = [string substringToIndex:7];//截取掉下標7之後的字串NSLog(@"截取的值為：%@",string);[string substringFromIndex:2];//截取掉下標2之前的字串NSLog(@"截取的值為：%@",string);

4.分隔字串，字串分割成數組

NSString*string =@"sdfsfsfsAdfsdf";NSArray *array = [string componentsSeparatedByString:@"A"]; //從字元A中分隔成2個元素的數組NSLog(@"array:%@",array); //結果是adfsfsfs和dfsdf

5，數組轉成字串

NSArray *array = @[@"a",@"b",@"c",@"d",@"e",@"f"];NSString *string = [array componentsJoinedByString:@","];,為分隔字元

6，過濾字串，過濾所有非字元符號

NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"[]{}（#%-*+=_）\\|~(＜＞$%^&*)_+ "];NSString * hmutStr = [[mutStr componentsSeparatedByCharactersInSet: doNotWant]componentsJoinedByString: @""];    NSLog(@"humStr is %@",hmutStr);    return hmutStr;

僅做記錄！如有不妥之處，請大家不吝指教！

ios開發之--NSString的操作