iOS - UIButton 不会出现在 UIView 上

Posted 2023-03-13

【中文标题】iOS - UIButton 不会出现在 UIView 上

【英文标题】：iOS - UIButton does not appear on UIView

【发布时间】：2013-05-18 14:51:54

【问题描述】：

这个调整应该用一个视图覆盖锁屏（确实会发生）并向视图添加一个“ios”按钮（不会发生）。这是我的代码：

#import <UIKit/UIKit.h>
#import <SpringBoard/SpringBoard.h>

@interface Themos
-(void)unlock;
@end

%hook SpringBoard
-(void)applicationDidFinishLaunching:(id)application

    %orig;

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10,10,80,30)];
    [button addTarget:self action:@selector(unlock:) forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"iOS" forState: UIControlStateNormal];

    UIWindow* window = [UIApplication sharedApplication].keyWindow;
    UIView *polygonView = [[UIView alloc] initWithFrame: CGRectMake ( 0, 0, 640, 960)];
    polygonView.backgroundColor = [UIColor redColor];
    [window addSubview:polygonView];
    [polygonView addSubview:button];
    [window makeKeyAndVisible];
    [polygonView release];
    [button release];


%new(v@:)
-(void)unlock

    [self unlockWithSound:YES];

%end

提前致谢！ :)

【参考方案1】：

在窗口可见后添加子视图到窗口。

在这行代码之后添加子视图然后它就会出现。

[window makeKeyAndVisible];


-(void)applicationDidFinishLaunching:(id)application

    %orig;

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10,10,80,30)];
    [button addTarget:self action:@selector(unlock:) forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"iOS" forState: UIControlStateNormal];

    UIWindow* window = [UIApplication sharedApplication].keyWindow;
    [window makeKeyAndVisible];
    UIView *polygonView = [[UIView alloc] initWithFrame: CGRectMake ( 0, 0, 640, 960)];
    polygonView.backgroundColor = [UIColor redColor];
    [window addSubview:polygonView];
    [polygonView addSubview:button];
    [polygonView release];
    [button release];

【讨论】：

@Nick Aliferopoulos：现在来了吗？

非常感谢！有效！ :) 现在我因为解锁设备的方式而崩溃了。你碰巧知道其他方法吗？

从中删除（解锁：）冒号并检查 it.place like (unlock)this.

@Nick Aliferopoulos：发生了什么？