ios无法再背景上添加文字

Question

这是我的代码  实在找不到原因 求解答

Answer 1

ZORTQSOWLILWFUDAVYHKGDEMORNCYAKTJLAPKGWRAJSJEUJKTCLBKBFEMBVSUXZCZBLNIRAJZGWFVVKSUDTPRUXSDZGVRNWSIYIHDYBQGIYOEFDFIKAJLTPKXBDFHKTODZHYDMIQTCYHWGVIKFVENCEAXNWSAXEGJYOXUXSBXGPRYBKBFAPYBIRGWGPMIJLHQFOXUXWLUIXMPRUDMBKZTJYAQSCFIXGVEAWSHFOLGCFOIKMJTJCETUDMBRTJZACKMCLGWQGJYAJSUVXSBLBXZBKGPYTWLHPENJEAJRAXGXSODMVLUDMOMOKNWSTVRVRPKZIKADSIRBYTVRNWKZIZIVDSIXAOWFVFZPEUJGWYTJTHRNDFOXGPTPEGVLGPSUJGPZOXLAWFIKUEXZILAWMOWFIOKFIKNJFHWAKZIKNPRNWMPBWFIXTJYBJFKMGWSADZPLIRAPYOQZPYHEJLOXFUQMPQTDFHJSBDZCSCHDFOKSOXGIYVETPJLOQGPZZCXNWRUJLCMPRGVLUDLOLONPLNWMFOYOXKSBKZOENCZCSODTORTPRHKQRAJFAWSBCSQMIRAJSIRIYWYHKMVKNQAIRAVFOPEHQTDBEACMOKGWTCWZOKNQFILVEEMVYOXGJSVSVKNJFVEUWGEWBVBXMYVYYIHAGWMIYBOSMPOKRGNZYIUHAKTPPBNRFBIQPFLEEUUAZWWXTGWWVYLPSBEYOETCSVLPLUDNCFUKADTXRZPYUQZIFIBRZWSUCLHRBZVRGQSIEUKAQNPYUPFUXADHHTWWCYOLVIMIXRYERARRHMSEXPYVSIOVIXGDFCIXGANMCBKNKGPSGLKDIYOYEXEDADCYEBKATDXEJYLBBQWZPMJDOREAGAWGAK