UI创建霓虹灯视图

NSArray *arr = [NSArrayarrayWithObjects:[UIColorpurpleColor],[UIColorcyanColor],[UIColorblueColor],[UIColorgreenColor],[UIColoryellowColor],[UIColororangeColor],[UIColorredColor], nil];

   for (int i =0; i < 7; i++) {

       UIView *view = [[UIViewalloc] initWithFrame:CGRectMake(i * (320 /14), i * (568 /14), 320 - i * (320 /14) * 2, 568 - i * (568 / 14) * 2)];

        view.backgroundColor = arr[i];

        [self.windowaddSubview:view];

        [viewrelease];

    }

方法二

for (int i =0; i < 7; i++) {

       UIView *view = [[UIViewalloc] initWithFrame:CGRectMake(20 + i *20 , 40 + i *20, 280 - i *20 * 2, 280 - i * 20 * 2)];

        view.backgroundColor = [UIColorcolorWithRed:(arc4random() %256 / 128  )green:(arc4random() %256 / 128) blue:(arc4random() % 256 /128 )alpha:0.5];

        [self.windowaddSubview:view];

        [viewrelease];

    }