从 UIController 调用 UIView

Posted 2023-03-13

【中文标题】从 UIController 调用 UIView

【英文标题】：Calling UIView from UIController

【发布时间】：2015-06-16 09:39:19

【问题描述】：

我正在尝试从我的 ViewController 调用 UIView FirstScreen。

但我不知道该怎么做。

视图控制器：

#import "ViewController.h"
#import "FirstScreen.h"

@interface ViewController ()

    FirstScreen *f; 

FirstScreen.m：

#import "FirstScreen.h"       
@implementation FirstScreen

- (id)initWithFrame:(CGRect)frame

    self = [super initWithFrame:frame];
    if (self) 
        [self didLoad];
    
    return self;


-(void) didLoad
    [self addLabel];
    [self addImageView];

【问题讨论】：

你是什么意思调用 UIView FirstScreen？

【参考方案1】：

@implementation FirstScreen

 - (id)initWithFrame:(CGRect)frame

self = [super initWithFrame:frame];
if (self) 
    [self didLoad];

return self;


-(void) didLoad

 f = [[FirstScreen alloc] initWithFrame:CGRectMake(0, 0, self.view.size.width, self.view.size.height)];
[self.view addSubview:f];

【参考方案2】：

#import "FirstScreen.h"

@implementation FirstScreen
-(instancetype)initWithFrame:(CGRect)frame
    self = [super initWithFrame:frame];
    // calling another methods
    [self anotherMethod];
    return self;


-(void) anotherMethod

    // write some code here

---

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad 
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    FirstScreenObj = [[FirstScreen alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
    FirstScreenObj.backgroundColor = [UIColor grayColor];
    [self.view addSubview:FirstScreenObj];

---

希望对你有帮助！