有谁知道如何解决"viewDidUnload undeclared"问题？

Question

还有如何解决"预期"; 在'{'令牌？之前的代码(来自xcode 3.2.3)

- (void)viewDidUnload {

    self.cheatName = nil;

    self.description = nil;

}

这两个错误都在第一行

- (void)viewDidLoad {
    [super viewDidLoad];

    [self.titleLabel setText:self.title];
    [self.descriptionLabel setText:self.description];


    float textHeight = [MLUtils calculateHeightOfTextFromWidth:self.description : descriptionLabel.font :descriptionLabel.frame.size.width :UILineBreakModeWordWrap];

    CGRect frame = descriptionLabel.frame;
    frame.size.height = textHeight;
    descriptionLabel.frame = frame;

    CGSize contentSize = descriptionScrollView.contentSize;
    contentSize.height = textHeight;
    descriptionScrollView.contentSize = contentSize;



- (void)viewDidUnload {
    self.cheatName = nil;
    self.description = nil;

}

Answer 1

你错过了一个结束括号:

- (void)viewDidLoad {
    [super viewDidLoad];

    [self.titleLabel setText:self.title];
    [self.descriptionLabel setText:self.description];


    float textHeight = [MLUtils calculateHeightOfTextFromWidth:self.description : descriptionLabel.font :descriptionLabel.frame.size.width :UILineBreakModeWordWrap];

    CGRect frame = descriptionLabel.frame;
    frame.size.height = textHeight;
    descriptionLabel.frame = frame;

    CGSize contentSize = descriptionScrollView.contentSize;
    contentSize.height = textHeight;
    descriptionScrollView.contentSize = contentSize;

} // <-- HERE

- (void)viewDidUnload {
    self.cheatName = nil;
    self.description = nil;

}

其次,我不确定这条线是否有效:

float textHeight = [MLUtils calculateHeightOfTextFromWidth:self.description : descriptionLabel.font :descriptionLabel.frame.size.width :UILineBreakModeWordWrap];

我想你必须添加像(虚构名称!)这样的参数名称:

float textHeight = [MLUtils calculateHeightOfTextFromWidth:self.description font: descriptionLabel.font width:descriptionLabel.frame.size.width whatever:UILineBreakModeWordWrap];