Drag to implement a picture move effect

Drag to implement a picture move effect

Write a gesture first, and note that the userinteractionenabled of the image is set to Yes

uipangesturerecognizer *pan = [[uipangesturerecognizeralloc] Initwithtarget:selfAction:@selector(pan:)] ;

UIImage *image = [UIImageimagenamed:@ "r.jpg"];

uiimageview *imageview = [[uiimageviewalloc] initwithframe:cgrectmake (ten, A, A, a)];

ImageView. image = image;

ImageView. userinteractionenabled =YES;

[selfaddsubview: ImageView];

[ImageViewAddgesturerecognizer:p an];

}

Drag the method, the last sentence is the key code

-(void) pan: ( Uipangesturerecognizer *) gesture

{

cgpoint point = [gesture- Translationinview: self];

    Gesture.view . center =cgpointmake (Gesture.view . center . x + point. x , gesture. view . center . y + point. y );

[Gesture settranslation:cgpointmake(0,0) InView : Self ];

}

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Drag to implement a picture move effect