iOS初始化UIView

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

//视图；
UIView *view1 = [[UIView alloc] init];
//位置大小；
view1.frame = CGRectMake(0, 0, 200, 300);
//背景颜色；
view1.backgroundColor = [UIColor yellowColor];

//将视图加入到父视图中；
[self.view addSubview:view1];

}

@end