Question

我有一个使用代码创建的视图控制器（没有界面构建器或故事板）。我正在尝试以编程方式添加一些视图（按钮和图像视图），我正在使用Masonry进行AutoLayout。

我有以下代码

- (instancetype)init {
    self = [super init];

    if (self) {
        self.view.backgroundColor = UIColor.whiteColor;
        self.progress = 0.f;
        self.shouldRecord = YES;
        [self createMainUI];
        [self addActions];
    }
    return self;
}

- (void)createMainUI {
    self.backButton = [self.view createAndAddSubView:UIButton.class];
    [self.backButton setImage:[TeamieUIGlobals defaultPicForPurpose:@"close" withSize:25.f] forState:UIControlStateNormal];
    [self.backButton addTarget:self action:@selector(dismissViewController) forControlEvents:UIControlEventTouchUpInside];

    self.micNormalImageView = [self.view createAndAddSubView:UIImageView.class];

    self.dynamicProgress = [self.view createAndAddSubView:TMEProgressImageView.class];
    self.dynamicProgress.image = IMAGE_MIC_WAVE;
    self.dynamicProgress.progress = 0;
    self.dynamicProgress.hasGrayscaleBackground = NO;
    self.dynamicProgress.verticalProgress = YES;

    self.recordButton = [self.view createAndAddSubView:UIButton.class];
    self.recordButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    self.recordButton.backgroundColor = UIColor.redColor;
    self.recordButton.layer.cornerRadius = 50.f;
    self.recordButton.titleLabel.font = [TeamieGlobals appFontFor:@"regularFontWithSize13"];
    [self.recordButton setTitle:@"Record" forState:UIControlStateNormal];
    [self.recordButton setTitleColor:UIColor.whiteColor forState:UIControlStateNormal];

    [self.backButton mas_makeConstraints:^(MASConstraintMaker *make){
        make.width.height.equalTo(@25);
        make.left.top.equalTo(@10);
    }];
    [self.micNormalImageView mas_makeConstraints:^(MASConstraintMaker *make){
        make.width.equalTo(@204);
        make.height.equalTo(@295);
        make.center.equalTo(self.view);
    }];
    [self.dynamicProgress mas_makeConstraints:^(MASConstraintMaker *make){
        make.width.equalTo(@204);
        make.height.equalTo(@295);
        make.center.equalTo(self.view);
    }];
    [self.recordButton mas_makeConstraints:^(MASConstraintMaker *make){
        make.width.height.equalTo(@100);
        make.centerX.equalTo(self.view);
        make.bottom.equalTo(self.view.mas_bottom).with.offset(15.f);
    }];
}

这是createAndAddSubView做的事情

- (id)createAndAddSubView:(Class)modelClass {
    id temporaryView = [modelClass new];
    [self insertSubview:(UIView *)temporaryView atIndex:0];
    return temporaryView;
}

模拟器中视图上显示的唯一视图是backButton，并且不会显示其他视图。

此外，添加到recordButton的最后2个约束会导致应用崩溃，错误为“couldn't find a common superview for <UIButton: 0x7ff2eb15f110; frame = (0 0; 0 0); opaque = NO; layer = <CALayer: 0x7ff2eb118c60>> and <UIView: 0x7ff2e8f4bf20; frame = (0 0; 320 568); autoresize = W+H; layer = <CALayer: 0x7ff2e8fdf220>>” 但是当我按下按钮时，没有错误但仍然在视图上看不到。知道为什么视图没有出现，代码有问题吗？

Answer 1

- (id)createAndAddSubView:(Class)modelClass {
    id temporaryView = [modelClass new];
    [self insertSubview:(UIView *)temporaryView atIndex:self.subviews.count];
    return temporaryView;
}

问题在于atIndex:0它应该是self.subviews.count

Answer 2

我认为问题可能是您在父视图中插入子视图的索引。替换[[self subviews] count]代替索引＆＃39; 0＆＃39; as-

- (id)createAndAddSubView:(Class)modelClass {
    id temporaryView = [modelClass new];
    [self insertSubview:(UIView *)temporaryView atIndex:[[self subviews] count]];
    return temporaryView;
}

Answer 3

上面提到的代码有几个问题： 1.如果错过了这个，请道歉，但是我没有看到设置每个子视图的帧的代码。这是不正确的。

self.recordButton = [self.view createAndAddSubView:UIButton.class];
self.recordButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

3。您将在先前添加的子视图之上添加每个子视图。

请检查所有这些方面，我认为您的代码应该有效。

使用AutoLayout以编程方式将视图添加到视图控制器的视图中

3 个答案: