//点击文本框时触发的事件
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField;
就这样，主页面算是勾画好了。接下来就是自定义view的部分了。
第二步：实现自定义view
1.创建类YLSOPickerView
2.在.h文件中声明变量，一个是需要传入的数组，一个是弹出框的标题。还要声明两个方法：
@interface YLSOPickerView : UIView
/** array */
@property (nonatomic,strong) NSArray *array;
/** title */
@property (nonatomic,strong) NSString *title;
//快速创建
+(instancetype)pickerView;
//弹出
-(void)show;
@end
3.接下来的就是最主要的工作，就是.m文件的编写
宏定义
#define YLSRect(x, y, w, h) CGRectMake([UIScreen mainScreen].bounds.size.width * x, [UIScreen mainScreen].bounds.size.height * y, [UIScreen mainScreen].bounds.size.width * w, [UIScreen mainScreen].bounds.size.height * h)
#define YLSFont(f) [UIFont systemFontOfSize:[UIScreen mainScreen].bounds.size.width * f]
#define YLSColorAlpha(r,g,b,a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:(a)]
#define YLSMainBackColor [UIColor colorWithRed:240/255.0 green:239/255.0 blue:245/255.0 alpha:1]
#define BlueColor [UIColor colorWithRed:0/255.0 green:122/255.0 blue:255/255.0 alpha:1]
#define ClearColor [UIColor clearColor]
声明需要用到的控件，遵守响应的协议
@interface YLSOPickerView()<UIPickerViewDelegate,UIPickerViewDataSource>
/** view */
@property (nonatomic,strong) UIView *topView;
/** button */
@property (nonatomic,strong) UIButton *doneBtn;
/** pickerView */
@property (nonatomic,strong) UIPickerView *pickerView;
/** 选择传回的值 */
@property (nonatomic,strong) NSString *result;
@end
实现init方法和创建方法
//快速创建
+ (instancetype)pickerView
{
return [[self alloc]init];
}
-(instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:YLSRect(0, 0, 1, 917/667)];
if (self)
{
self.backgroundColor = YLSColorAlpha(0, 0, 0, 0.4);
}
return self;
}
这里呢我要说一下的是，为了达到在点击文本框从下弹出的一个动态效果，所以起初的时候我将整个view的长度设置成了一个屏幕的长度加上选择器的长度，在弹出方法中我将整个view上移着添加进屏幕。这样会有好看点效果
添加页面控件，设置样式位置等
-(void)layoutSubviews
{
[super layoutSubviews];
self.topView = [[UIView alloc]initWithFrame:YLSRect(0, 667/667, 1, 250/667)];
self.topView.backgroundColor = [UIColor whiteColor];
[self addSubview:self.topView];
//为view上面的两个角做成圆角。不喜欢的可以注掉
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.topView.bounds byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(5, 5)];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = self.topView.bounds;
maskLayer.path = maskPath.CGPath;
self.topView.layer.mask = maskLayer;
self.doneBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[self.doneBtn setTitle:@"Done" forState:UIControlStateNormal];
[self.doneBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
[self.doneBtn setFrame:YLSRect(320/375, 5/667, 50/375, 40/667)];
[self.doneBtn addTarget:self action:@selector(quit) forControlEvents:UIControlEventTouchUpInside];
[self.topView addSubview:self.doneBtn];
UILabel *titlelb = [[UILabel alloc]initWithFrame:YLSRect(100/375, 0, 175/375, 50/667)];
titlelb.backgroundColor = ClearColor;
titlelb.textAlignment = NSTextAlignmentCenter;
titlelb.text = self.title;
titlelb.font = YLSFont(20/375);
[self.topView addSubview:titlelb];
self.pickerView = [[UIPickerView alloc]init];
[self.pickerView setFrame:YLSRect(0, 50/667, 1, 200/667)];
[self.pickerView setBackgroundColor:YLSMainBackColor];
[self.pickerView setDelegate:self];
[self.pickerView setDataSource:self];
[self.pickerView selectRow:0 inComponent:0 animated:YES];
[self.topView addSubview:self.pickerView];
}
