Examples of Uipickerview use in iOS development

The system's Uipickerview is very simple, the style is also very simple monotonous, the interface feeling is very monotonous not good-looking, sometimes needs us to customize, makes oneself wants the style. First give the generic style of the Uipickerview example, put the code:

#import "ZidingyipikViewController.h"

@interface Zidingyipikviewcontroller () <uipickerviewdelegate,uipickerviewdatasource>{
Record whether the wheel is sliding
NSString *guildstr;
NSString *selectstr;
Nsmutablearray *datamutarray;
UIButton *bgbutton;
}

@end

@implementation Zidingyipikviewcontroller

-(void) Viewdidload {
[Super Viewdidload];
Datamutarray = [Nsmutablearray arraywitharray:@[@ "student", @ "worker", @ "teacher", @ "security", @ "Doctor", @ "Nurse", @ "Waiter"]];
UIButton *button = [[UIButton alloc] Initwithframe:cgrectmake (80, 140, 70, 30)];
[Button settitle:@ "pop-up box" forstate:uicontrolstatenormal];
[Button Settitlecolor:[uicolor Whitecolor] forstate:uicontrolstatenormal];
Button.backgroundcolor = [Uicolor Orangecolor];
[Button addtarget:self action: @selector (Buttonaction) forcontrolevents:uicontroleventtouchupinside];
[Self.view Addsubview:button];
}
#pragma mark-Bomb frame
-(void) buttonaction{
Guildstr = @ "0";
Bgbutton = [[UIButton alloc] Initwithframe:cgrectmake (0, 0, Kscreenwidth, kscreenheight)];
Bgbutton.backgroundcolor = RGBA (0, 0, 0, 0.3);
[Bgbutton addtarget:self Action: @selector (bgbuttonaction:) forcontrolevents:uicontroleventtouchupinside];
[Self.view Addsubview:bgbutton];

UIView *cycanview = [[UIView alloc] Initwithframe:cgrectmake (0, kScreenHeight-180, Kscreenwidth, 40)];
Cycanview.backgroundcolor = [Uicolor Orangecolor];
[Bgbutton Addsubview:cycanview];

Uilabel *titlelabel = [[Uilabel alloc] Initwithframe:cgrectmake (0, 0, Kscreenwidth, cycanview.height)];
Titlelabel.text = @ "Select Identity";
Titlelabel.font = font (14);
Titlelabel.textcolor = [Uicolor Whitecolor];
Titlelabel.textalignment = Nstextalignmentcenter;
[Cycanview Addsubview:titlelabel];

UIButton *cancelbutton = [[UIButton alloc] Initwithframe:cgrectmake (0, 0,, Cycanview.height)];
[CancelButton settitle:@ "Cancel" forstate:uicontrolstatenormal];
[CancelButton Settitlecolor:[uicolor Whitecolor] forstate:uicontrolstatenormal];
CancelButton.titleLabel.font = font (14);
[CancelButton addtarget:self Action: @selector (bgbuttonaction:) forcontrolevents:uicontroleventtouchupinside];
[Cycanview Addsubview:cancelbutton];

UIButton *confirmbutton = [[UIButton alloc] Initwithframe:cgrectmake (kScreenWidth-48, 0, Cycanview.height)];
[ConfirmButton settitle:@ "determine" forstate:uicontrolstatenormal];
[ConfirmButton Settitlecolor:[uicolor Whitecolor] forstate:uicontrolstatenormal];
ConfirmButton.titleLabel.font = font (14);
[ConfirmButton addtarget:self Action: @selector (confirmbuttonaction:) forcontrolevents:uicontroleventtouchupinside ];
[Cycanview Addsubview:confirmbutton];

Uipickerview *selectpickerview = [[Uipickerview alloc] Initwithframe:cgrectmake (0, kScreenHeight-140, Kscreenwidth, 140)];
Show check box
Selectpickerview.showsselectionindicator = NO;
Selectpickerview.backgroundcolor = [Uicolor Whitecolor];
Selectpickerview.delegate = self;
Selectpickerview.datasource = self;
Selectpickerview.autoresizingmask = Uiviewautoresizingflexiblewidth;
[Bgbutton Addsubview:selectpickerview];
}
#pragma mark-Hidden bomb frame
-(void) Bgbuttonaction: (UIButton *) sender{
[Bgbutton Removefromsuperview];
}
#pragma mark-Bomb box OK button
-(void) Confirmbuttonaction: (UIButton *) sender{
if ([Guildstr isequaltostring:@ "0"]) {
SELECTSTR = [NSString stringwithformat:@ "%@", Datamutarray[0]];
}
[Self showhudtextonly:selectstr];
[Bgbutton Removefromsuperview];
}
#pragma Mark-uipickerview Proxy method
Number of Pickerview columns
-(Nsinteger) Numberofcomponentsinpickerview: (Uipickerview *) Pickerview {
return 1;
}
Number of Pickerview per column
-(Nsinteger) Pickerview: (Uipickerview *) Pickerview numberofrowsincomponent: (Nsinteger) Component {
return datamutarray.count;
}
Width per column
-(CGFloat) Pickerview: (Uipickerview *) Pickerview widthforcomponent: (Nsinteger) Component {
return kScreenWidth-85 * 2;
}
Returns the selected row
-(void) Pickerview: (Uipickerview *) Pickerview Didselectrow: (nsinteger) Row incomponent: (Nsinteger) component
{
GUILDSTR = @ "1";
SELECTSTR = [NSString stringwithformat:@ "%@", [Datamutarray Objectatindex:row]];
NSLog (@ "selectstr:%@", selectstr);
}
Returns the contents of the current row, where the values in the array are added to the scrolling display bar
-(nsstring*) Pickerview: (Uipickerview *) Pickerview Titleforrow: (nsinteger) Row forcomponent: (Nsinteger) component
{
return [Datamutarray Objectatindex:row];
}

Next, if you want to change the style, customize the Uipickerview style you want, just rewrite the method. Method:

Override method to change font size
-(UIView *) Pickerview: (Uipickerview *) Pickerview Viewforrow: (nsinteger) Row forcomponent: (Nsinteger) component Reusingview: (UIView *) view{
Uilabel *pickerlabel = (Uilabel *) view;
if (!pickerlabel) {
Pickerlabel = [[Uilabel alloc] init];
Pickerlabel.font = Font (17);
Pickerlabel.textcolor = [Uicolor blackcolor];
Pickerlabel.textalignment = 1;
[Pickerlabel Setbackgroundcolor:[uicolor Clearcolor]];
}
Pickerlabel.text = [self Pickerview:pickerview titleforrow:row forcomponent:component];
In the proxy method, add the following two lines of code to remove the black and down
[[Pickerview.subviews objectatindex:1] sethidden:yes];
[[Pickerview.subviews Objectatindex:2] sethidden:yes];

UIView *lineview1 = [[UIView alloc] Initwithframe:cgrectmake (n., kScreenWidth-85 * 2, 1.8)];
Lineview1.backgroundcolor = RGB (245, 245, 245);
[Pickerview Addsubview:lineview1];

UIView *lineview2 = [[UIView alloc] Initwithframe:cgrectmake (kScreenWidth-85 (2, 1.8)];
Lineview2.backgroundcolor = RGB (245, 245, 245);
[Pickerview Addsubview:lineview2];

return Pickerlabel;
}
Note:
Current screen width
#define Kscreenwidth [UIScreen mainscreen].bounds.size.width
Current screen height
#define Kscreenheight [UIScreen mainscreen].bounds.size.height