1、字符串拼接
NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];
2、字符串转int
int intString = [newString intValue];
3、int转字符串
NSString *stringInt = [NSString stringWithFormat:@"%d",intString];
4、字符串转float
float floatString = [ newString floatValue];
5、float转字符串
NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];
6、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
NSString *str = array[1];
NSLog(@"str:%@",str);//结果是dfsdf
7、将string字符串转换为array数组
NSArray *array = [str componentsSeparatedByString:@","];--分隔符
8、将array数组转换为string字符串
NSString *str = [array componentsJoinedByString:@","];--分隔符
