标签：随机数
// 一次产生六个随机数
#define SHU_COUNT 6
//每个随机数的大小范围
#define ALL_NUM 10
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
self.window.backgroundColor = [UIColor grayColor];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setBackgroundColor:[UIColor purpleColor]];
[btn addTarget:self action:@selector(actionSuiJi:) forControlEvents:UIControlEventTouchUpInside];
btn.frame = CGRectMake(0, 0, 200, 40);
btn.center = self.window.center;
[self.window addSubview:btn];
[btn setTitle:@"一次产生多个随机数" forState:UIControlStateNormal];
UITextView *textView = [[UITextView alloc] init];
textView.frame = CGRectMake(60, 100, 200, 80);
textView.tag = 1;
[textView setFont:[UIFont systemFontOfSize:17]];
textView.textAlignment = NSTextAlignmentCenter;
[self.window addSubview:textView];
[self.window makeKeyAndVisible];
return YES;
}
- (IBAction)actionSuiJi:(id)sender
{
int z = 0;
int x = SHU_COUNT;
NSMutableArray *mutArrGet = [NSMutableArray array];
for (int i = 0; i < x; i++) {
z++;
int b = arc4random()%ALL_NUM+1;
BOOL isUse = [self compare:mutArrGet andNum:b];
if (isUse) {
[mutArrGet addObject:[NSString stringWithFormat:@"%d",b]];
}else{
x++;
}
if ([mutArrGet count] == SHU_COUNT) break;
}
UITextView *tv = (UITextView *)[self.window viewWithTag:1];
NSMutableString *mutS = [[NSMutableString alloc] init];
for (NSString *s in mutArrGet) {
[mutS appendString:s];
[mutS appendString:@" "];
}
tv.text = mutS;
}
- (BOOL)compare:(NSMutableArray *)mutArr andNum:(int)index
{
for (NSString *s in mutArr) {
if (index == [s integerValue]) {
return NO;
}
}
return YES;
}
标签：随机数
原文地址：http://blog.csdn.net/tubiebutu/article/details/44513999
