设置UIView的位置和尺寸

1.说明

iOS里看到的和摸到的都是UIView

视图和窗口展示了应用的的界面，同时负责界面的交互

2.实例

起：使用方法intWithFrame安装frame建立新的View，并将新的View通过addSubview加入到父View中

终：在屏幕中间和屏幕右上角设置两个区域

.h

#import

@interface UIKitPrjFrame : UIViewController

@end

.m

#import "UIKitPrjFrame.h"

@interface UIKitPrjFrame ()

@end

@implementation UIKitPrjFrame

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor blackColor];

    UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectZero];
    label1.text = @"右上方";
    label1.backgroundColor = [UIColor whiteColor];
    label1.frame = CGRectMake(220, 20, 100, 50);
    
    UILabel *label2 = [[UILabel alloc] initWithFrame:label1.frame];
    label2.textAlignment = NSTextAlignmentCenter;
    label2.backgroundColor = [UIColor whiteColor];
    label2.text = @"中心位置";
    
    CGPoint newPoint = self.view.center;
    label2.center = newPoint;
    
    [self.view addSubview:label1];
    [self.view addSubview:label2];
    
}

Main.storyboard

customClass="UIKitPrjFrame" customModuleProvider="" sceneMemberID="viewController">      

    

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