1.截取字符串
NSString*string =@"sdfsfsfsAdfsdf";
string = [string substringToIndex:7];
//截取掉下标7之前的字符串NSLog(@"截取的值为：%@",string);
[string substringFromIndex:2];//截取掉下标2之后的字符串
NSLog(@"截取的值为：%@",string);
2.匹配字符串
NSString*string =@"sdfsfsfsAdfsdf";NSRangerange = [stringrangeOfString:@"f"];
//匹配得到的下标
NSLog(@"rang:%@",NSStringFromRange(range));
string = [string substringWithRange:range];
//截取范围类的字符串NSLog(@"截取的值为：%@",string);
3.分隔字符串
NSString*string =@"sdfsfsfsAdfsdf";
NSArray *array = [string componentsSeparatedByString:@"A"];
//从字符A中分隔成2个元素的数组
NSLog(@"array:%@",array); //结果是adfsfsfs和dfsdf
4，隔段取字符串
NSString *a = [[NSStringalloc] initWithString : @"冬瓜，西瓜，火龙果，大头，小狗" ];
NSArray *b = [a componentsSeparatedByString:@"，"];
NSString *a3 = [b objectAtIndex:2];
NSLog(@"\n b的第三个东东是： %@", a3);