近期項目第三方登入之後預設建立賬号和密碼,就用随機數生産,這裡隻需要傳入你需要幾位的随機數即可,例如你需要得到8位的随機數,num就傳入8
好了,廢話少說,簡單Demo如下:
- (NSString *)getRandomStringWithNum:(NSInteger)num
{
NSString *string = [[NSString alloc]init];
for (int i = 0; i < num; i++) {
int number = arc4random() % 36;
if (number < 10) {
int figure = arc4random() % 10;
NSString *tempString = [NSString stringWithFormat:@"%d", figure];
string = [string stringByAppendingString:tempString];
}else {
int figure = (arc4random() % 26) + 97;
char character = figure;
NSString *tempString = [NSString stringWithFormat:@"%c", character];
string = [string stringByAppendingString:tempString];
}
}
return string;
}