IOS 自定义从底部弹上来的View

效果图：



／／从底部向上弹起的UIView类源码

#import "TFSheetView.h"

@interface TFSheetView()
{
UIView *_contentView;
}

@end

@implementation TFSheetView

- (id)initWithFrame:(CGRect)frame
{
if (self == [super initWithFrame:frame])
{
[self initContent];
}

return self;
}

- (void)initContent
{
self.frame = CGRectMake(0, 0, kDEVICEWIDTH, kDEVICEHEIGHT);

//alpha 0.0  白色   alpha 1 ：黑色   alpha 0～1 ：遮罩颜色，逐渐
self.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.4];
self.userInteractionEnabled = YES;
[self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(disMissView)]];

if (_contentView == nil)
{
_contentView = [[UIView alloc]initWithFrame:CGRectMake(0, kDEVICEHEIGHT - 216, kDEVICEWIDTH, 216)];
_contentView.backgroundColor = [UIColor redColor];
[self addSubview:_contentView];
}
}

- (void)loadMaskView
{
}

//展示从底部向上弹出的UIView（包含遮罩）
- (void)showInView:(UIView *)view
{
if (!view)
{
return;
}

[view addSubview:self];
[view addSubview:_contentView];

[_contentView setFrame:CGRectMake(0, kDEVICEHEIGHT, kDEVICEWIDTH, 216)];

[UIView animateWithDuration:0.3 animations:^{

self.alpha = 1.0;

[_contentView setFrame:CGRectMake(0, kDEVICEHEIGHT - 216, kDEVICEWIDTH, 216)];

} completion:nil];
}

//移除从上向底部弹下去的UIView（包含遮罩）
- (void)disMissView
{
[_contentView setFrame:CGRectMake(0, kDEVICEHEIGHT - 216, kDEVICEWIDTH, 216)];
[UIView animateWithDuration:0.3f
animations:^{

self.alpha = 0.0;

[_contentView setFrame:CGRectMake(0, kDEVICEHEIGHT, kDEVICEWIDTH, 216)];
}
completion:^(BOOL finished){

[self removeFromSuperview];
[_contentView removeFromSuperview];

}];

}

@end

使用方法：

1.在一个ViewController中，初始化一个button，添加点击事件

- (void)loadBtnView
{
UIButton *_loginButton = [[UIButton alloc]initWithFrame:CGRectMake(40, 220, kDEVICEWIDTH - 40*2, 40)];
[_loginButton setTitle:@"加载" forState:UIControlStateNormal];
_loginButton.backgroundColor = [UIColor grayColor];
[_loginButton addTarget:self action:@selector(loadClicked) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_loginButton];
}

2. 加载从底部向上弹起的UIView（如效果图所示）

- (void)loadClicked
{
//[_sheetView showInView:self.view];
_tfSheetView = [[TFSheetView alloc]init];
[_tfSheetView showInView:self.view];
}

3. 点击一下遮罩，页面会自动下去（从上向下）