UIButton的两种block传值方式
UIButton的两种block传值方式
方式1 - 作为属性来传值
BlockView.h 与 BlockView.m
//
// BlockView.h
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
@class BlockView;
/**
定义枚举值
*/
typedef enum : NSUInteger {
LEFT_BUTTON = 0x19871220,
RIGHT_BUTTON,
} BUTTON_FLAG;
/**
* 定义block
*
* @param flag 枚举值
* @param blockView 当前的blockView
*/
typedef void (^ButtonEvent)(BUTTON_FLAG flag, BlockView *blockView);
@interface BlockView : UIView
@property (nonatomic, copy) ButtonEvent buttonEvent; // 作为属性的block
@property (nonatomic, strong) NSString *leftTitle;
@property (nonatomic, strong) NSString *rightTitle;
@end//
// BlockView.m
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "BlockView.h"
@interface BlockView ()
@property (nonatomic, strong) UIButton *leftButton;
@property (nonatomic, strong) UIButton *rightButton;
@end
@implementation BlockView
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// 获取尺寸相关内容
CGFloat width = frame.size.width;
CGFloat height = frame.size.height;
CGFloat buttonWidth = width / 2.f;
// 初始化按钮
self.leftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, buttonWidth, height)];
self.leftButton.tag = LEFT_BUTTON;
[self.leftButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[self.leftButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[self.leftButton setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[self.leftButton addTarget:self
action:@selector(buttonEvents:)
forControlEvents:UIControlEventTouchUpInside];
self.leftButton.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:12.f];
[self addSubview:self.leftButton];
self.rightButton = [[UIButton alloc] initWithFrame:CGRectMake(buttonWidth, 0, buttonWidth, height)];
self.rightButton.tag = RIGHT_BUTTON;
[self.rightButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[self.rightButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[self.rightButton setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[self.rightButton addTarget:self
action:@selector(buttonEvents:)
forControlEvents:UIControlEventTouchUpInside];
self.rightButton.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:12.f];
[self addSubview:self.rightButton];
}
return self;
}
- (void)buttonEvents:(UIButton *)button {
// 如果有block值，则从block获取值
if (self.buttonEvent) {
self.buttonEvent(button.tag, self);
}
}
#pragma mark - 重写setter，getter方法
@synthesize leftTitle = _leftTitle;
- (void)setLeftTitle:(NSString *)leftTitle {
_leftTitle = leftTitle;
[self.leftButton setTitle:leftTitle forState:UIControlStateNormal];
}
- (NSString *)leftTitle {
return _leftTitle;
}
@synthesize rightTitle = _rightTitle;
- (void)setRightTitle:(NSString *)rightTitle {
_rightTitle = rightTitle;
[self.rightButton setTitle:rightTitle forState:UIControlStateNormal];
}
- (NSString *)rightTitle {
return _rightTitle;
}
@end控制器源码：
//
// ViewController.m
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "ViewController.h"
#import "BlockView.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
BlockView *blockView = [[BlockView alloc] initWithFrame:CGRectMake(0, 0, 200, 30)];
blockView.layer.borderWidth = 1.f;
blockView.leftTitle = @"YouXianMing";
blockView.rightTitle = @"NoZuoNoDie";
// 从block中获取到事件
blockView.buttonEvent = ^(BUTTON_FLAG flag, BlockView *blockView) {
NSLog(@"%lu", flag);
};
blockView.center = self.view.center;
[self.view addSubview:blockView];
}
@end
方式2 - 作为方法来传值
BlockView.h 与 BlockView.m
//
// BlockView.h
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
@class BlockView;
/**
定义枚举值
*/
typedef enum : NSUInteger {
LEFT_BUTTON = 0x19871220,
RIGHT_BUTTON,
} BUTTON_FLAG;
/**
* 定义block
*
* @param flag 枚举值
* @param blockView 当前的blockView
*/
typedef void (^ButtonEvent)(BUTTON_FLAG flag, BlockView *blockView);
@interface BlockView : UIView
@property (nonatomic, strong) NSString *leftTitle;
@property (nonatomic, strong) NSString *rightTitle;
/**
* 定义成方法来实现
*
* @param buttonEvent block
*/
- (void)buttonEvent:(ButtonEvent)buttonEvent;
@end//
// BlockView.m
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "BlockView.h"
@interface BlockView ()
@property (nonatomic, strong) UIButton *leftButton;
@property (nonatomic, strong) UIButton *rightButton;
@property (nonatomic, copy) ButtonEvent buttonEvent;
@end
@implementation BlockView
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// 获取尺寸相关内容
CGFloat width = frame.size.width;
CGFloat height = frame.size.height;
CGFloat buttonWidth = width / 2.f;
// 初始化按钮
self.leftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, buttonWidth, height)];
self.leftButton.tag = LEFT_BUTTON;
[self.leftButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[self.leftButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[self.leftButton setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[self.leftButton addTarget:self
action:@selector(buttonEvents:)
forControlEvents:UIControlEventTouchUpInside];
self.leftButton.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:12.f];
[self addSubview:self.leftButton];
self.rightButton = [[UIButton alloc] initWithFrame:CGRectMake(buttonWidth, 0, buttonWidth, height)];
self.rightButton.tag = RIGHT_BUTTON;
[self.rightButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[self.rightButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[self.rightButton setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[self.rightButton addTarget:self
action:@selector(buttonEvents:)
forControlEvents:UIControlEventTouchUpInside];
self.rightButton.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:12.f];
[self addSubview:self.rightButton];
}
return self;
}
- (void)buttonEvents:(UIButton *)button {
if (self.buttonEvent) {
self.buttonEvent(button.tag, self);
}
}
- (void)buttonEvent:(ButtonEvent)buttonEvent {
// 初始化block
self.buttonEvent = ^(BUTTON_FLAG flag, BlockView *blockView) {
if (buttonEvent) {
buttonEvent(flag, blockView);
}
};
}
#pragma mark - 重写setter，getter方法
@synthesize leftTitle = _leftTitle;
- (void)setLeftTitle:(NSString *)leftTitle {
_leftTitle = leftTitle;
[self.leftButton setTitle:leftTitle forState:UIControlStateNormal];
}
- (NSString *)leftTitle {
return _leftTitle;
}
@synthesize rightTitle = _rightTitle;
- (void)setRightTitle:(NSString *)rightTitle {
_rightTitle = rightTitle;
[self.rightButton setTitle:rightTitle forState:UIControlStateNormal];
}
- (NSString *)rightTitle {
return _rightTitle;
}
@end控制器源码：
//
// ViewController.m
// Block
//
// Created by YouXianMing on 15/1/14.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "ViewController.h"
#import "BlockView.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
BlockView *blockView = [[BlockView alloc] initWithFrame:CGRectMake(0, 0, 200, 30)];
blockView.layer.borderWidth = 1.f;
blockView.leftTitle = @"YouXianMing";
blockView.rightTitle = @"NoZuoNoDie";
[blockView buttonEvent:^(BUTTON_FLAG flag, BlockView *blockView) {
NSLog(@"%lu", flag);
}];
blockView.center = self.view.center;
[self.view addSubview:blockView];
}
@end