自定义PickView，一行代码即可搞定选择器！

Sian

1、先上效果图：
   

2、使用说明：
该控件可以广泛应用于各种选择场景，这里以TextField为例，只需要一行代码即可在需要选择控件的TextField中应用

1. [SAPickView pickViewWithArray:array forTextField:textField];

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轻松搞定！

3、源代码
SAPickView.h

1. //
2. //  SAPickView.h
3. //
4. //  Created by Sian on 14-9-29.
5. //  Copyright (c) 2014年 Sian. All rights reserved.
6. //
8. #import <UIKit/UIKit.h>
10. @interface SAPickView : UIView
12. @property (nonatomic, strong)   UIPickerView    *pickView;
14. @property (nonatomic, strong)   NSArray         *dataArray;
16. @property (nonatomic, strong)   UITextField     *textField;
18. - (id)initWithArray:(NSArray *)array;
20. + (void)pickViewWithArray:(NSArray *)array forTextField:(UITextField *)textField;
22. - (void)show;
24. @end

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SAPickView.m

1. //
2. //  SAPickView.m
3. //
4. //  Created by Sian on 14-9-29.
5. //  Copyright (c) 2014年 Sian. All rights reserved.
6. //
8. #import "SAPickView.h"
10. @interface SAPickView () <UIPickerViewDataSource, UIPickerViewDelegate>
11. {
12.     UIToolbar   *_toolBar;
13.     CGSize      _size;
14. }
15. @end
16. @implementation SAPickView
18. - (id)initWithArray:(NSArray *)array
19. {
20.     if (self = [super init]) {
21.         self.alpha = 0;
22.         self.dataArray = array;
23.         _size = [[UIScreen mainScreen] bounds].size;
24.         self.backgroundColor = [UIColor clearColor];
25.         [self addsubViews];
26.     } return self;
27. }
29. - (void)addsubViews
30. {
31.     self.frame = (CGRect){CGPointZero, _size};
32.     [[[[UIApplication sharedApplication] delegate] window] addSubview:self];
33.    
34.     _toolBar = [[UIToolbar alloc] init];
35.     _toolBar.tintColor = kGrayColor(1.0);
36.     _toolBar.frame = (CGRect){0, _size.height, _size.width, 44};
37.     [self addSubview:_toolBar];
38.    
39.     // 按钮自定义
40.     UIBarButtonItem *item1 = [UIBarButtonItem barButtonItemWithTitle:@"取消" addTarget:self action:@selector(dismiss)];
41.     UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
42.     UIBarButtonItem *item3 = [UIBarButtonItem barButtonItemWithTitle:@"确定" addTarget:self action:@selector(done)];
43.     _toolBar.items = [NSArray arrayWithObjects:item1, item2, item3, nil];
44.    
45.     self.pickView = [[UIPickerView alloc] init];
46.     self.pickView.showsSelectionIndicator = YES;
47.     self.pickView.backgroundColor = kGrayColor(1.0);
48.     self.pickView.dataSource = self;
49.     self.pickView.delegate = self;
50.     self.pickView.frame = (CGRect){0, _size.height + 44, _size.width, 206 - 44};
51.     [self addSubview:self.pickView];
52. }
54. + (void)pickViewWithArray:(NSArray *)array forTextField:(UITextField *)textField
55. {
56.     SAPickView *pickView = [[self alloc] initWithArray:array];
57.     pickView.textField = textField;
58.     [pickView show];
59. }
61. - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
62. {
63.     return 1;
64. }
66. - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
67. {
68.     return self.dataArray.count;
69. }
71. - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
72. {
73.     return self.dataArray[row];
74. }
76. - (void)show
77. {
78.     [UIView animateWithDuration:0.3 animations:^{
79.         self.alpha = 1;
80.         _toolBar.frame = (CGRect){0, _size.height - 206, _size.width, 44};
81.         self.pickView.frame = (CGRect){0, _size.height - 206 + 44, _size.width, 206 - 44};
82.     }];
83. }
85. - (void)dismiss
86. {
87.     [UIView animateWithDuration:0.3 animations:^{
88.         self.alpha = 0;
89.         _toolBar.frame = (CGRect){0, _size.height, _size.width, 44};
90.         self.pickView.frame = (CGRect){0, _size.height + 44, _size.width, 206 - 44};
91.     } completion:^(BOOL finished) {
92.         [self removeFromSuperview];
93.     }];
94. }
96. - (void)done
97. {
98.     self.textField.text = [self.dataArray objectAtIndex:[self.pickView selectedRowInComponent:0]];
99.     [self dismiss];
100. }
101. @end

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