Beautiful drop-down animation loading View

-(Ibaction) changepassword :( ID) sender

{

Cgsize size = [[uiscreen mainscreen] bounds]. size;

// Add a translucent Layer

Bgview = [[uiview alloc] initwithframe: Self. View. Frame];

Bgview. backgroundcolor = [uicolor colorwithwhite: 0.2 ALPHA: 0.7];

[Self. parentviewcontroller. View addsubview: bgview];

// Add the password modification window to the parent view because uitableview cannot directly add subview. Give the window an initial rotation angle.

Self. changepwd = [[self storyboard] instantiateviewcontrollerwithidentifier: @ "changepasswordid"];

Self. changepwd. Delegate = self;

[Self. changepwd. View setframe: cgrectmake (0,-200,280,200)];

[Self. changepwd. View settransform: cgaffinetransformmakerotation (-m_pi/20)];

[Self. parentviewcontroller. View addsubview: Self. changepwd. View];

// Animation loading password window

[Uiview animatewithduration: 0.3 animations: ^ {

[Self. changepwd. View settransform: cgaffinetransformmakerotation (0)];

[Self. changepwd. View setframe: cgrectmake (20, size. Height/2-100,280,200)];

}];

// Add a drag gesture to the window

Uipangesturerecognizer * panrecognizer = [[uipangesturerecognizer alloc] initwithtarget: Self action: @ selector (panpaswordview :)];

[Panrecognizer setminimumnumberoftouches: 1];

[Panrecognizer setmaximumnumberoftouches: 1];

[Self. parentviewcontroller. View addgesturerecognizer: panrecognizer];

}

 

-(Void) panpaswordview :( ID) sender {

[Self. View bringsubviewtofront: [(uipangesturerecognizer *) sender view];

Cgpoint translatedpoint = [(uipangesturerecognizer *) sender translationinview: Self. View];

// Record the center point of the floating window when dragging starts

If ([(uipangesturerecognizer *) sender State] = uigesturerecognizerstatebegan ){

Firstx = self. changepwd. View. Center. X;

Firsty = self. changepwd. View. Center. Y;

}

// Obtain the coordinates After dragging

Translatedpoint = cgpointmake (firstx, firsty + translatedpoint. y );

// Do not drag up

If (translatedpoint. Y <firsty ){

Return;

}

// Update the window position instantly when dragging

[Self. changepwd. View setcenter: translatedpoint];

// Close the password window when dragging ends and remove the additional gesture

If ([(uipangesturerecognizer *) sender State] = uigesturerecognizerstateended ){

[Self removepasswordview];

[Self. parentviewcontroller. View removegesturerecognizer :( uipangesturerecognizer *) sender];

}

}

 

-(Void) removepasswordview

{

[Uiview animatewithduration: 0.5 animations: ^ {

[Self. changepwd. View setframe: cgrectmake (20,113 6, 280,200)];

Bgview. Alpha = 0.0;

} Completion: ^ (bool finished ){

[Self. changepwd. View removefromsuperview];

[Bgview removefromsuperview];

}];

}