A variety of picker in iOS

Briefly

In the application of some settings often need to use some picker to quickly help users select the value, the general use of Uidatepicker,uipickerview and Uiimagepickercontroller.

Initial interface

As shown in the diagram, in the construction of a good interface, implementation methods to complete the various options. First, date selection.

Uidatepicker

The main attributes that need to be set are

Locale

Datepickermode

Uidatepicker *datepicker = [[Uidatepicker 

alloc] init];  
Datepicker.locale = [[Nslocale alloc] initwithlocaleidentifier:@ "ZH_HANS_CN"];  
Datepicker.datepickermode = uidatepickermodedate;  
      
NSString *stddate = @ "1990-01-01";  
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];  
Formatter.dateformat = @ "Yyyy-mm-dd";  
[DatePicker setdate:[formatter datefromstring:stddate] animated:yes];  
[DatePicker addtarget:self Action: @selector (showdate:) 

forcontrolevents:uicontroleventvaluechanged];  
      
_datefield.inputview = DatePicker;  
_datefield.text = stddate;