我将 UITextField 的图层作为子图层添加到实际上是 UIImageView 的现有图层。我在图像视图上应用透视旋转,它工作正常。但是 UITextField 不会变为活动状态。发送给它的 beginFirstResponder 消息不显示键盘。点击它不起作用,它在用户交互中保持非活动状态。我还尝试为文本字段的图层设置 zPosition,使其位于 imageview 图层之上,并且是 zPosition。
rightband = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"right-band.png"]];
rightband.layer.frame = CGRectMake(623.5, 310.5, 624, 210);
rightband.layer.zPosition = 40.0f;
usernameField = [[UITextField alloc] initWithFrame:CGRectMake(10, 10, 260, 26)];
usernameField.clearButtonMode = UITextFieldViewModeWhileEditing;
usernameField.keyboardType = UIKeyboardTypeDefault;
usernameField.autocapitalizationType = UITextAutocapitalizationTypeNone;
usernameField.borderStyle = UITextBorderStyleNone;
usernameField.backgroundColor = [UIColor clearColor];
usernameField.font = [UIFont fontWithName:@"HelveticaNeue" size:17];
usernameField.textColor = UIColorFromRGB(0x303030);
usernameField.textAlignment = UITextAlignmentLeft;
usernameField.placeholder = @"Username";
usernameField.autocorrectionType = UITextAutocorrectionTypeNo;
usernameField.returnKeyType = UIReturnKeyNext;
usernameField.delegate = self;
usernameField.layer.anchorPoint = CGPointMake(1.0f, 0.5f);
usernameField.layer.zPosition = 100.0f;
usernameField.layer.frame = CGRectMake(10, 10, 260, 26);
[rightband.layer addSublayer:usernameField.layer];