我试图让LLDB(在带有OS X应用程序的Xcode 4.3.2中运行)不停止某些信号.如果我进入
process handle SIGUSR2 -n true -p true -s false
在调试控制台上它工作正常,LLDB不再停止在SIGUSR2上.
但是,如果我放
command process handle SIGUSR2 -n true -p true -s false
进入〜/ .lldbinit似乎被忽略了.此文件中的其他命令(例如别名)工作正常.
如何使LLDB永远不会停止某些信号?
你能解释下面的代码吗?
str = (char *) malloc (sizeof(char) * (num+1));
Run Code Online (Sandbox Code Playgroud)
malloc
做什么的?num + 1
用?我想从左到右布局单元格。所以我使用UICollectionViewFlowLayout
:
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
// use this for let cell width fit for label width
layout.estimatedItemSize = CGSizeMake(80, 30);
self.collectionView = [[UICollectionView alloc] initWithFrame:self.view.bounds collectionViewLayout:layout];
Run Code Online (Sandbox Code Playgroud)
单元格的宽度适合标签的宽度:
// cell code
@implementation CQGoodsSearchCell
- (void)setupUI {
self.contentView.layer.cornerRadius = 15;
self.contentView.layer.masksToBounds = YES;
self.contentView.backgroundColor = [UIColor colorWithRed:1.00 green:1.00 blue:1.00 alpha:1.00];
self.nameLabel = [[UILabel alloc] init];
[self.contentView addSubview:self.nameLabel];
self.nameLabel.font = [UIFont systemFontOfSize:15];
self.nameLabel.textColor = [UIColor colorWithRed:0.18 green:0.18 blue:0.18 alpha:1.00];
[self.nameLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(30);
make.top.bottom.mas_offset(0);
make.left.mas_offset(10);
make.right.mas_offset(-10);
}];
} …
Run Code Online (Sandbox Code Playgroud) 当键盘出现在iPhone上时,我正在尝试向上滚动文本框,我使用以下代码但是我收到错误:
在对象类型'UITextField'上找不到属性'origin'
studentLoanTextBox.frame = CGRectMake(
studentLoanTextBox.origin.x,
studentLoanTextBox.origin.y - 100.0,
studentLoanTextBox.frame.size.width,
studentLoanTextBox.frame.size.height
);
Run Code Online (Sandbox Code Playgroud) objective-c ×2
autolayout ×1
c ×1
c++ ×1
cocoa-touch ×1
ios ×1
lldb ×1
macos ×1
malloc ×1
xcode ×1