自定義提醒框或下拉菜單2

對於自定義view，關鍵是思惟，你以爲是怎樣就怎樣，並非只有一種答案。

對於上篇博客的第一個自定義view的代碼：

#import <UIKit/UIKit.h>

@interface InputAlertView : UIView

@property (nonatomic , strong) UILabel *changeInfoLabel;

@property (nonatomic , strong) UIView *lineView1;

@property (nonatomic , strong) UITextField *inputPwdTF;

@property (nonatomic , strong) UIView *lineView2;

@property (nonatomic , strong) UIButton *okBtn;

@end

#define kRowHeight (self.frame.size.height-2)/3

#import "InputAlertView.h"

@implementation InputAlertView

- (instancetype) initWithFrame:(CGRect)frame

{

    if (self = [super initWithFrame:frame]) {

        [self subViews];

        [self makeSubviewConstraint];

    }

    return self;

}

- (void) subViews

{

    [self addSubview:self.changeInfoLabel];

    [self addSubview:self.lineView1];

    [self addSubview:self.inputPwdTF];

    [self addSubview:self.lineView2];

    [self addSubview:self.okBtn];

}

- (void) makeSubviewConstraint

{

    [_changeInfoLabel mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.and.left.and.right.equalTo(self);

        make.height.equalTo(@(kRowHeight+5));

    }];

    [_lineView1 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.and.right.equalTo(self);

        make.top.equalTo(_changeInfoLabel.mas_bottom);

        make.height.equalTo(@1);

    }];

    [_inputPwdTF mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.and.right.equalTo(self);

        make.top.equalTo(_lineView1.mas_bottom);

        make.height.equalTo(@(kRowHeight-10));

    }];

    [_lineView2 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.and.right.equalTo(self);

        make.top.equalTo(_inputPwdTF.mas_bottom);

        make.height.equalTo(@1);

    }];

    [_okBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.equalTo(@35);

        make.right.equalTo(@(-35));

        make.top.equalTo(_lineView2.mas_bottom).offset(10);

        make.bottom.equalTo(self).offset(-10);

    }];

}

- (UILabel *) changeInfoLabel

{

    if (!_changeInfoLabel) {

        _changeInfoLabel = [UILabel new];

        _changeInfoLabel.textAlignment = NSTextAlignmentCenter;

        _changeInfoLabel.font = MC_16_Font;

        _changeInfoLabel.textColor = [UIColor blackColor];

    }

    return _changeInfoLabel;

}

- (UIView *) lineView1

{

    if (!_lineView1) {

        _lineView1 = [UIView new];

        _lineView1.backgroundColor = [UIColor lightGrayColor];

    }

    return _lineView1;

}

- (UITextField *) inputPwdTF

{

    if (!_inputPwdTF) {

        _inputPwdTF = [UITextField new];

        _inputPwdTF.textAlignment = NSTextAlignmentCenter;

    }

    return _inputPwdTF;

}

- (UIView *) lineView2

{

    if (!_lineView2) {

        _lineView2 = [UIView new];

        _lineView2.backgroundColor = [UIColor lightGrayColor];

    }

    return _lineView2;

}

- (UIButton *) okBtn

{

    if (!_okBtn) {

        _okBtn = [UIButton buttonWithType:UIButtonTypeCustom];

        [_okBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

        _okBtn.backgroundColor = MCColorWithRGBA(224, 71, 79, 1.0);

        _okBtn.layer.cornerRadius = 15;

        _okBtn.layer.masksToBounds = YES;

    }

    return _okBtn;

}

@end

對於第二個就是自定義一個tableview：

#import <UIKit/UIKit.h>

@interface alertTableView : UITableView<UITableViewDataSource,UITableViewDelegate>

@property (nonatomic ,strong) NSArray *titleArr;

@end

#import "alertTableView.h"

#import "TitleCenterCell.h"

@implementation alertTableView

- (instancetype) initWithFrame:(CGRect)frame style:(UITableViewStyle)style

{

    if (self = [super initWithFrame:frame style:style]) {

        [self registerClass:[TitleCenterCell class] forCellReuseIdentifier:@"centerCell"];

        self.dataSource = self;

        self.delegate = self;

    }

    return self;

}

#pragma mark UITableViewDataSource Delegate

- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return self.titleArr.count;

}

- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    TitleCenterCell *cell = [tableView dequeueReusableCellWithIdentifier:@"centerCell"];

    cell.titleCenterLabel.text = self.titleArr[indexPath.row];

    return cell;

}

#pragma mark UITableView Delegate

- (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{

    return 50.0;

}

- (CGFloat) tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

{

    return 0.f;

}

- (CGFloat) tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section

{

    return 0.f;

}

- (void) tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath

{

    cell.separatorInset = UIEdgeInsetsZero;

    [cell setLayoutMargins:UIEdgeInsetsZero];

}

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

}

@end

其中自定義了一個UITableViewCell使字體居中，代碼以下：

#import <UIKit/UIKit.h>

@interface TitleCenterCell : UITableViewCell

@property (nonatomic , strong) UILabel *titleCenterLabel;

@end

#import "TitleCenterCell.h"

@implementation TitleCenterCell

- (instancetype) initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier

{

    if (self = [super initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier]) {

        [self addViews];

        [self makeLabelContraint];

    }

    

    return self;

}

- (void) addViews

{

    [self.contentView addSubview:self.titleCenterLabel];

}

- (void) makeLabelContraint

{

    [_titleCenterLabel mas_makeConstraints:^(MASConstraintMaker *make) {

        make.edges.equalTo(self);

    }];

}

- (UILabel *) titleCenterLabel

{

    if (!_titleCenterLabel) {

        _titleCenterLabel = [UILabel new];

        _titleCenterLabel.textAlignment = NSTextAlignmentCenter;

    }

    return _titleCenterLabel;

}

@end