iOS 字符串的相关处理简单总结

NSString字符串处理：截取字符串、匹配字符串、分隔字符串

1.截取字符串

NSString*string =@"wefsfsfsAdfsdf";

string =[string substringToIndex:5];//截取掉下标5之后的字符串

NSLog(@"截取的值为：%@",string);

[string substringFromIndex:2];//截取掉下标2之前的字符串

NSLog(@"截取值为：%@",string);

2.匹配字符串

NSString*string =@"wefsfsfsAdfsdf";

NSRangerange =[stringrangeOfString:@"f"];//匹配得到的下标

NSLog(@"rang:%@",NSStringFromRange:NSMakeRange(3,4));

string =[string substringWithRange::NSMakeRange(3,4)];//截取范围类的字符串

NSLog(@"截取值为：%@",string);

3.分隔字符串

NSString*string =@"wefsfsfsAdfsdf";

NSArray *arr =[string componentsSeparatedByString:@"-"];//从字符-中分隔成2个元素的数组

NSLog(@"arr:%@",arr);//结果是adfsfsfs和dfsdf

4.数组转字符串

NSString *string =[array componentsJoinedByString:@","];,为分隔符