与 UIView 子类相关的 UIView 元素显示在其容器之外

Posted 2023-03-13

【中文标题】与 UIView 子类相关的 UIView 元素显示在其容器之外

【英文标题】：UIView elements relevant to subclass of UIView are showing up outside of their container

【发布时间】：2016-11-05 19:32:36

【问题描述】：

我只是想将两个UIButtons 和一个UILabel 添加到我制作的 UIView 的子类中。这是那个子类：

InvitedView.m

#import "InvitedView.h"
#import "AppDelegate.h"

@class ViewController;

@interface InvitedView() 
    UIButton *accept;
    UIButton *decline;
    UILabel *question;
    UIView *gray;
    ViewController *myViewController;
    NSString *holduser;


@end

@implementation InvitedView

- (id)initWithFrame:(CGRect)frame

    self = [super initWithFrame:frame];
    if (self) 
        gray = [[UIView alloc] initWithFrame:frame];

        if(![(AppDelegate*)[[UIApplication sharedApplication] delegate] invitedby]) 
            //
        
        else 
            holduser = [[NSString alloc] initWithString:[(AppDelegate*)[[UIApplication sharedApplication] delegate] getInvitedBy]];
        

        question = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height / 2)];
        accept = [[UIButton alloc] initWithFrame:CGRectMake(0, frame.size.height / 2, frame.size.width / 2, frame.size.height / 2)];
        decline = [[UIButton alloc] initWithFrame:CGRectMake(frame.size.width / 2, frame.size.height / 2, frame.size.width / 2, frame.size.height / 2)];

        accept.backgroundColor = [UIColor redColor];
        decline.backgroundColor = [UIColor greenColor];
        question.backgroundColor = [UIColor blueColor];
        [question setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];
        [decline.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];
        [accept.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];

        [accept.titleLabel setText:@"ACCEPT"];
        [accept.titleLabel setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
        //accept.layer.borderWidth = 2;
        //accept.layer.borderColor = (__bridge CGColorRef _Nullable)([UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]);

        [decline.titleLabel setText:@"DECLINE"];
        [decline.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:16.0]];
        [decline.titleLabel setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
        //decline.layer.borderColor = (__bridge CGColorRef _Nullable)([UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]);
        //decline.layer.borderWidth = 2;

        NSLog(@"holduser way down ********: %@", holduser);
        [question setText:[[NSString alloc] initWithFormat:@"You have been invited to a group game by %@", holduser]];
        question.numberOfLines = 0;
        question.textAlignment = NSTextAlignmentCenter;
        [question setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
        [question setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:14.0]];

        [accept addTarget:myViewController action:@selector(acceptInvite) forControlEvents:UIControlEventTouchUpInside];
        [decline addTarget:myViewController action:@selector(declineInvite) forControlEvents:UIControlEventTouchUpInside];
        [gray addSubview:accept];
        [gray addSubview:decline];
        [gray addSubview:question];
        [self addSubview:gray];
    
    return self;


@end

在我的视图控制器中，我添加了一个InvitedView 实例：

invitedView = [[InvitedView alloc] initWithFrame:CGRectMake(50, 244, 220, 120)];

我使用[invitedView setHidden:YES] 将实例设置为隐藏。

稍后在流程中，我的应用调用了一个方法，该方法更改了 InvitedView 实例的 setHidden 值，如下所示：

- (void)doSomethingWithTheNewValueOfFlagForHid 
    dispatch_async(dispatch_get_main_queue(), ^(void)
        [invitedView setHidden:NO];
    );

上图是输出。如您所见，按钮和标签不在框内，即使我将它们相对定位在InsideView.m 内。有任何想法吗？谢谢。

更新

InvitedView.m 中的实现块现在如下所示：

@implementation InvitedView

-(void)drawRect:(CGRect)frame 

    question = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height / 2)];
    accept = [[UIButton alloc] initWithFrame:CGRectMake(0, frame.size.height / 2, frame.size.width / 2, frame.size.height / 2)];
    decline = [[UIButton alloc] initWithFrame:CGRectMake(frame.size.width / 2, frame.size.height / 2, frame.size.width / 2, frame.size.height / 2)];

    accept.backgroundColor = [UIColor redColor];
    decline.backgroundColor = [UIColor greenColor];
    question.backgroundColor = [UIColor blueColor];
    [question setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];
    [decline.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];
    [accept.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:10.0]];
    [accept.titleLabel setText:@"ACCEPT"];
    [accept.titleLabel setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
    //accept.layer.borderWidth = 2;
    //accept.layer.borderColor = (__bridge CGColorRef _Nullable)([UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]);

    [decline.titleLabel setText:@"DECLINE"];
    [decline.titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:16.0]];
    [decline.titleLabel setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
    //decline.layer.borderColor = (__bridge CGColorRef _Nullable)([UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]);
    //decline.layer.borderWidth = 2;

    NSLog(@"holduser way down ********: %@", holduser);
    [question setText:[[NSString alloc] initWithFormat:@"You have been invited to a group game by %@", holduser]];
    question.numberOfLines = 0;
    question.textAlignment = NSTextAlignmentCenter;
    [question setTextColor:[UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f]];
    [question setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:14.0]];

    [accept addTarget:myViewController action:@selector(acceptInvite) forControlEvents:UIControlEventTouchUpInside];
    [decline addTarget:myViewController action:@selector(declineInvite) forControlEvents:UIControlEventTouchUpInside];
    [gray addSubview:accept];
    [gray addSubview:decline];
    [gray addSubview:question];


- (id)initWithFrame:(CGRect)frame

    if(![(AppDelegate*)[[UIApplication sharedApplication] delegate] invitedby]) 
        //
    
    else 
        holduser = [[NSString alloc] initWithString:[(AppDelegate*)[[UIApplication sharedApplication] delegate] getInvitedBy]];
    

    self = [super initWithFrame:frame];

    if (self) 
        gray = [[UIView alloc] initWithFrame:frame];
        [self addSubview:gray];
    
    return self;


@end

【参考方案1】：

将上面的代码写在initWithFrame:的if块中，而不是把它写进

-(void)drawRect:(CGRect)frame
    // Draw your custom view inside this method.

【讨论】：

嘿 Syed，感谢您的回复，我更新了答案以反映我的代码在实现您的解决方案时的样子。还是和上图一样。

我想通了，不是因为 drawRect 我在发布答案

【参考方案2】：

我需要改变：

[gray addSubview:accept];
[gray addSubview:decline];
[gray addSubview:question];

到：

[self addSubview:accept];
[self addSubview:decline];
[self addSubview:question];

我还使用self 代替gray（删除gray 实例化），因为InvitedView 本身就是UIView。