相关疑难解决方法(0)

有许多方法来替代,比如initWithNibname:,awakeFromNib,loadView,viewDidLoad,viewDidAppear:,layoutSubviews,我只是不能决定其中为了获得这些方法调用.

我只是"用心"覆盖其中一个.

任何详细的解释？

我试图编写rhodes本机扩展扩展来打开iOS MailComposer.现在代码"工作",但MFMailComposeViewController没有显示,xcode显示警告:

Attempt to present <MFMailComposeViewController: 0x12b60840> on <Iosmailto: 0xc1898d0> whose view is not in the window hierarchy!

我读到UIViewControllers必须在层次结构中,但我不能从Rhodes ruby​​代码或clear-C扩展包装器中提供.现在我正在尝试使用来自[UIApplication sharedApplication] .keyWindow.rootViewController的MFMailComposeController呈现我的UIViewController,但邮件编辑器尚未显示.

来自iosmailto.h的界面:

@interface Iosmailto : UIViewController<MFMailComposeViewControllerDelegate>
{
}
    @property(nonatomic, assign) id delegate;
    //-(IBAction)send_mail:(id)sender;
@end

从iosmailto.m实现:

@implementation Iosmailto

    - (void)viewDidLoad {
        [super viewDidLoad];
        [self send_mail];
    }

    - (void)send_mail {
        if ([MFMailComposeViewController canSendMail]) {

            MFMailComposeViewController *composer = [[MFMailComposeViewController alloc] init];
            composer.mailComposeDelegate = self;
            [composer setSubject:[NSString stringWithUTF8String:subj]];

            NSArray *recipients_array = [NSArray arrayWithObject:[NSString stringWithUTF8String:recipients]]; …