firemonkey

问题 How i can destroy form, I want: creatr Form1(start application), create Form 2, destroy Form1, working with form2, then create form 3, destroy form2. but I not know how to destroy form. If i call: procedure TFPressStartScreen.btn1Click(Sender: TObject); begin MainScreen.FMainScreen := MainScreen.TFMainScreen.Create(Application); MainScreen.FMainScreen.Show; DisposeOf; end; FPressStartScreen - 1 form, FMainScreen - 2 form, i create 2 form and need destroy 1. but i get access violation. 来源：

问题 I have a Firemonkey TListBox in an Android app and in OnPaint I place 3 buttons on the selected TListBoxItem. They are being displayed and all have a OnClick event assigned. But when clicking them this event usually does not fire. Only seldom I get the button clicked. I guess the TListBox already received the click and declared it as handled. Is there any way otherwise? Can I register a tap in the form itsself and determine from the position of the tap which of the buttons must have been

问题 I'm using Delphi 10.2 Update 3, with an iOS target of 11.3 and an iPad running iOS 10.3.3. When I try to compile my project for a iOS device, this error occurs: [DCC Error] E2597 ld: warning: directory not found for option '-FC:\Users\gustavo.reinert\Documents\Embarcadero\Studio\SDKs\iPhoneOS11.3.sdk\System\Library\PrivateFrameworks' ld: warning: directory not found for option '-LC:\Users\Marcio.Amorim\Documents\Embarcadero\Studio\SDKs\MacOSX10.13.sdk\usr\lib\system' ld: file not found: /usr

问题 lets say you want to create a Notification with a repeat interval so that it is recurring var MyNotification : TNotification; begin MyNotification := NotificationCenter1.CreateNotification; try MyNotification.Name := 'FirstNotification'; MyNotification.AlertBody := 'First Notification!'; MyNotification.FireDate := IncSecond(Now,15);// Note this fires 15 secs from NOW MyNotification.RepeatInterval := TRepeatInterval.Minute; Notificationcenter1.ScheduleNotification(MyNotification); finally

问题 I am trying to add an array of TBitmap images to different records of a ClientDataSet (in a ftBlob field) and then save those records to a SQLite database. The BLOB field (DocImage) is a required field in the database. However, my code does not seem to save the bitmaps to the blob field in the ClientDataSet at all... So when I call BdmMain.cdsTrxDoc.ApplyUpdates(0) , I get the error: "Field 'DocImage' must have a value." I have checked the size of my BlobStream (BlobStream.Size) before and

问题 Normally, while scrolling the contents of a "scroll box", no event functions are fired from the sub-components of a scroll box, e. g. in native apps. But in FireMonkey, if a TVertScrollBox contains sub-elements like TRectangle (which I want to use as menu entries for a custom menu), scrolling the TVertScrollBox on Android with a finger sometimes triggers the event functions (like OnClick) of the sub-elements and this is very confusing for me and our customers - They don't want to tap a

问题 Normally, while scrolling the contents of a "scroll box", no event functions are fired from the sub-components of a scroll box, e. g. in native apps. But in FireMonkey, if a TVertScrollBox contains sub-elements like TRectangle (which I want to use as menu entries for a custom menu), scrolling the TVertScrollBox on Android with a finger sometimes triggers the event functions (like OnClick) of the sub-elements and this is very confusing for me and our customers - They don't want to tap a

问题 Normally, while scrolling the contents of a "scroll box", no event functions are fired from the sub-components of a scroll box, e. g. in native apps. But in FireMonkey, if a TVertScrollBox contains sub-elements like TRectangle (which I want to use as menu entries for a custom menu), scrolling the TVertScrollBox on Android with a finger sometimes triggers the event functions (like OnClick) of the sub-elements and this is very confusing for me and our customers - They don't want to tap a

问题 I have a TImage on a form in FMX (FireMonkey). I want to load a bitmap into the TImage at runtime, where the bitmap should have a transparent background defined by the first pixel's color in the bitmap. This color might be different from bitmap to bitmap. I know how to do this at design time, by using the MultiResBitmap editor for a TImage. However, I can't find any examples of how to do this at runtime. Do I have to do this manually (get the color of the first pixel in the bitmap, then

问题 I have a TImage on a form in FMX (FireMonkey). I want to load a bitmap into the TImage at runtime, where the bitmap should have a transparent background defined by the first pixel's color in the bitmap. This color might be different from bitmap to bitmap. I know how to do this at design time, by using the MultiResBitmap editor for a TImage. However, I can't find any examples of how to do this at runtime. Do I have to do this manually (get the color of the first pixel in the bitmap, then