自定义PickView，一行代码即可搞定选择器！

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. //
   
7. 
   
8. #import <UIKit/UIKit.h>
   
9. 
   
10. @interface SAPickView : UIView
    
11. 
    
12. @property (nonatomic, strong)   UIPickerView    *pickView;
    
13. 
    
14. @property (nonatomic, strong)   NSArray         *dataArray;
    
15. 
    
16. @property (nonatomic, strong)   UITextField     *textField;
    
17. 
    
18. - (id)initWithArray:(NSArray *)array;
    
19. 
    
20. + (void)pickViewWithArray:(NSArray *)array forTextField:(UITextField *)textField;
    
21. 
    
22. - (void)show;
    
23. 
    
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. //
   
7. 
   
8. #import "SAPickView.h"
   
9. 
   
10. @interface SAPickView () <UIPickerViewDataSource, UIPickerViewDelegate>
    
11. {
    
12.     UIToolbar   *_toolBar;
    
13.     CGSize      _size;
    
14. }
    
15. @end
    
16. @implementation SAPickView
    
17. 
    
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. }
    
28. 
    
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. }
    
53. 
    
54. + (void)pickViewWithArray:(NSArray *)array forTextField:(UITextField *)textField
    
55. {
    
56.     SAPickView *pickView = [[self alloc] initWithArray:array];
    
57.     pickView.textField = textField;
    
58.     [pickView show];
    
59. }
    
60. 
    
61. - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
    
62. {
    
63.     return 1;
    
64. }
    
65. 
    
66. - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
    
67. {
    
68.     return self.dataArray.count;
    
69. }
    
70. 
    
71. - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
    
72. {
    
73.     return self.dataArray[row];
    
74. }
    
75. 
    
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. }
    
84. 
    
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. }
    
95. 
    
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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