我想在我的iOS应用中为UIViewcontroller添加背景 - (void)viewDidLoad {
[super viewDidLoad];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
[imageView setImage:[UIImage imageNamed:@"background"]];
[self.view addSubview:imageView];
}
。
buttons这很遗憾地产生了一个覆盖整个屏幕的结果。
有没有办法将此子视图移动到底层，以便它不会覆盖我的textfields和data all_data;
length fname $100 path $200 version 8 ;
length Date_L_ Time_L_ 8 Type $10.;
informat Date_L_ date11. Time_L_ time18.3 ;
format version z3. Date_L_ date11. Time_L_ time12.3 ;
do fname='shanghai','london','newyork';
do version=1 to 100 ;
path = catx('\','H:',cats(fname,put(version,z3.),'.csv'));
if not fileexist(path) then do;
put 'ERROR: File not found. ' path=:$quote.;
continue;
end;
infile csvfile filevar=path dsd truncover end=eof;
if not eof then input ;
do while (not eof);
input Date_L_ Time_L_ Type ;
output;
end;
end;
end;
run;
？
答案 0 :(得分：2)
您需要在层次结构的底部插入视图
[self.view insertSubview:imageView atIndex:0];