iOS 获取随机字符串

-(NSString *)getRandomStr

{

char data[6];

for (int x=0;x < 6;data[x++] = (char)('A' + (arc4random_uniform(26))));

NSString *randomStr = [[NSString alloc] initWithBytes:data length:6 encoding:NSUTF8StringEncoding];

NSString *string = [NSString stringWithFormat:@"%@",randomStr];

DLog(@"获取随机字符串 %@",string);

return string;

}