最近在xcode8打开之前的动画代码,看到如下警告
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v2H6rw+CcMAS0ej1Xhqa3l6CC21Dg14Qg0cZQA2hrpBzWsuhz2lQX15J6Uy+VdgCdTPpSklmSM/bJn5m+qfMRUr2fje/dn8Hn4RfyQrXun71Ye5kxdjdDwFegelcJNdkozT2LMcPIbvgIRcfwqcNbuJPyQQyMSbSnWRK2AHa3kjYmKRaiw6h2/Fd3DV6N7wCzYhe8DjRsBTSGWf5pBnZsGcXOJHuVjR+Ghy8/xHZ4FWgLLmQm78R4KMGDcdpwhetyKZjjRJxqMV6mVODbPM+RLx6Rfz0EErYLaUXmmrEiApyezyhpcfnoaQjvOw6arDI8qJPzrIhKOjUVooCf8e/TBxbVjUV7Kt8n8g8fhGTUWUxNP4Ix4vCuFK3XsEYQfw5XxO2cfvwor4KjKTCWsKJzxNjUJcWQ1YPHsph7iB0hUL2z1tju7og5xq8imeAi0QNaJuEU8tnbDt+LAdVYWC5hTyODeAXgiuB1ChzyF0ymT8dmUM5y+FOMbuijNTIcWnUpFKOORlSeBl1cOX+ZH+E6cyuSF+Zfz/FD57YZvwi6ynqmzT2JydAEWP/ct4shcIZ1XNXZGfQC7uSkWV2CJuIlToNvQXogfH4eDbKCpcEBAEB9FlU6WuTjeMsesBBP1VjpTvWLOLzsW2uNwOt6N4nGduOaiwRqk40AKDxbEyaAuDlcPH36Pn3EQU5adhIrJBeHF2skYwkqMg16muTiC7GxCbOIhjGEYB2zCwWLdBFtHX5WTjk92k2xZkDc9faoLJkdcm7EoLxSH2jCr30UJJ0kv8LK7MpX1ubw8sTbPeGe8skkAbJFT+pRD8S+/YqKuTSwzWz3WWbS4sq4mOTEeGxnLfxkWhW/CEaZnyB1YGYs16RqcIT0UGrWJb1fUFg5ybcE6XZ4C/zdtx6+YHjsfESHN0cwvAGuTJiOwgm//oBaxaX0TrF7QC+t2Gqwqzv2awKm8GIuCV+HZHxcgIohJgESe189jzFTB+leGZeFbcTj9JCYsPIsvp2zh2oWgF1gdrKF2coJZ+EhPMF2x7Bd+csXKyNobJ0MrU7FmeSxXZxNjc7hC6OucaIjbsZT+4vNjup7JVyziOXOVBjtjkrgF1rryKk3ndQLTU3wb0SD+w3ikYTfC5pK8k9wItMR8Gcm6iZ5U+AXh86AT2H+dl/XjCQcxfXZneNDhOZ99E4q86L4IauGOJ8aNQ+ICHxRXiNuEIx7tyNflhrgiPOrPxkzMQsXrV4bjSp3cidsvw46JszQeZNVNSCRdzDBfgTWnymEsi3x+9f1r2r+a6kZTGag/n2RxjCXZYPU+lbWBrTjBtQ/Sd0rjfk+KVxrV0SDC5OIsNSKLjZBQceUn2ClJMTC6WloVq6aL7pkfCzNzNZU4ev4OBoV4IP/geey5QnDTS9Xt2gjqshbl4uVyMwL3q4cLXl41G4OQjW837kXKGZrjicAuQ3csm9wD7goXdOrxF+CsUA4HuLs7waepj+Ah+u2OR9v7wr95CH3vpTMCe/XGoC6iYInbykv0QTrqekY+6UTfBnHEkFdcgTxWn/R+zRXetPD7KRV2byvHLYJcfdzM3GBGNS+dBhJNanFu/y3sPqThTonKPk/1VlGNTNhjzGhXuCrs0fUlT3hRataA6KgvPPOJL3oQNzs2lyHzIuDlxFssHOjDVJ5NFPQtFDt4NFPA05cuZz6sITy6dxlBE8k9ZtfeN3UagONH4o/yDtgU49JSd2QmKtB6joq2ivFK5PZVvqFUnFLiQoISGsKq5njdjcfJrRbuPnz7cSXMXH1r4CQaZwS9MI3jc0oPdwmGHj4vh4p8SeuuZEmvk4Wm+jx9EE0XWn2Vv2HPzJ+FW3AnEo+i75T+eOe1YMT8kMvFKr1wHIsRggNxM/D9C01RSfOW9C1xwDsv4UDim5jg58BNQNhqaiEJbW7SAUzzIVnKmYG14Y/gZzZAJUrVxUUIeD4Mp3OWY3/PNPznHA1IaLU7R7cqfuNENv42YzLu5CxA35hfcYoGoJZoCewHhQ3F5/264Nf40ehKi0D7VqwCXptDNJZjXfdMTN7AD6yF+E9Evo73e5IQ6vOtRdLKGGAmpUmchqnBgWDzMua0xQVYSROt4V8XYnHKR3gnmDq/ihJsy3RFCwFbihc4pC/Cg5kcUmf9TT7eieiLqJdU2HSUFqd0TgpX9oG8rMxW+HzdDNw5FoGdU85xkwQBR2grkDZ0MPYkLkdK8AksVfWgcn2CdTiKn2jCqSV9P2rxHJym8Gifo/g6rQqmeAi08n9LwngMoDpZjpLlLfB01HGuzqQw51jWiKxVLVphOi7jAnV++2Li4fLWfOJjKSJL1uMLo+2GpfjkueP4R8pS3MmajeLpNMCmwcQewtc1Vodvb1ekqEg3aGvRcsAoVCXOQOF8L7wXdw3OgT2xbnYXfPjjqwgnc4V0XkpMiluKjGFaTAleQQPrK2YTCQFzw68aASGDkLixNQa8mQq1g3hRhSwDN3RlJQtLnpSVjhGS4JftpshDJUa8O5XwmI+u29bgO2EhgMtcCg9AL4N6BpUInzMOYUEjsHV+T3gwuQANik8txbbwVtIyzcXxR8x/ZqBkczNMXgmso7rN+FiDf/18Q0+Zu2GWI1ZGC/LG2kzla7NJ/mfgi6AS/HxRQ+eKWJKXAkQteh130iMRP/0IwqJnoHrfWPx97XmuHpg89X7heWrjS7HIdSsWJpXaJKdQaJF22AsfUblYm9g4fhcy+Y6QL9P1TPSd5Yo8Kmv1oRCMH37EaGJtLP+eGDHwFr47xtphIdZFe2AgyVV1eRGKA/qQ7lqOyzMdMWBlFrR10GXT0BnbXkc/Nw0ObctGK1+DDDn7d8Y/wvw4/lTpZ7EzpC8iJg1C3tw0nbWbvi/mXoC+jy3BB0PDMUPos6TybEELCVeT8TMN/5B7Hu+5t0ef4J74UtQuQFbjtKH9UUIYRAQ5wrF1Z1zOnIHTx0Zg4yTeesF07YRprB4+RO/ozbg19CVqkzOAhSk4Q/pNum1Z0F9cfr2RQHgVbmyBRT8wm1MtynJKwMbDdeWlVXhj8aFPSE/NR9sl+8iqrsQ4Qd4/JnkX0ZLU35Jy64Kwd0j+E5msl+KbaB9M7OsJVc4VWhzwoH+Cc8Szk55CL1r4NbhauDwagi2zn6EyheERFkB10Xs6WUqzlhOOo5Gz/zLpR9Z+abJ0iPQZ4fjUnhjEsL2hkniUY9P0A3gvdhpOn3oFHWmh2lgWDbnX5860f6020Y3GMlBZbz61eRkYsNAVl0l2DizuC2QWEae0O73HAByJbFMna9KWGkrGDzsN6e2qK+B4eRtvpWHe6st0XeQjMGsNhbE4YqfOK8F1sshofi9DVkkNinLLSKnUkgWDsUiOBsfu7qJRIO97///VXkVk81ewliYAgY8Gwp8sJKx9i91tnZIT6zpxuNR9NUUmWYSaHaJAsHjCeBJSfrNcN4kQUvMTGOHJPC8H+LKJhBet+oV54e0pwmRSSGHht7kCPiydmwKDl3lh3GNCHd0xyV+XnpheMbIIuzLvwK+DE5r5UhmMSPN80uKjhLONR/WFA+jFtvz1izBc9PzqNzkStMVeWvRKUqHXBC2qLzrh6FhPnE4VM0RKpFktfWOnFl5hVegxRSejOhJidSOmKl5bEftz9+pyXLlUbIKFWayHxqPGrbU1+4qhnDUk5Ll76WN2Bi/UGgbXnD8LZ/HMXBniaUVwZ9xuRH1xFGkxp5FNgu/d7Ul83iyZVndWIPrMbXjS2L7H395Ai/Wf0GrgtzhcaS/qRIDfzxVh6QvtWTNDs54dEaaXbGeEdOAXHbw8feCiHxewmFTb3l3QqS0RhyNa9qNZA3lbpmXGPHlUIe1EF0wcxG9m69y3A5lHjWWNfZROwbLjHLuhAQKliejPp+kzLBi+ugF9xu4E/D2uGTZ8NARPtGB8kXNzpg6LONTT4Hz5P8WX8ffD2Vi3LBEff38Wi7dc0pVcGleWyLNfWzzCSDs7kfXAnOjg3r4cjo5KH4x/sgVFdES3EB8UlmhRRVt19n2bQCtutHf8mwK0tKKCrp7OpzrpyNHyDgpAWKmaeJPGnPFl5GhQzDSAo6IKFzIKkLJlJ60m/4c6+FbADWGFmiJUqCheNjYu+R5jIn9CSpAPSm/QiiWrkyd1+A4M4vGtqcaVo7/ir+GxmLLoAOlSJ6MsWV1azsseQQOfwrqN3fDB9HicM+4aTejwj2UkB61DRmJLi82Y8vV5oK051pIJBU8pfmli7NkvBMP8mAbzpANquuAq1YveSeJB8mgkg/rYRjdMLjpyAzHLMu3ZrwXYznOFC/UlYwK47Ux+3TqgLN+4hxATNpc3nn5Ef+pYyPWPGI1JNPC3Ki8tqeEya1e/YHSm8YmiTVuEXa2gGmPy1AsjensSJXsMmxiGlJM3bZJT+lw8wmb3gD+rHl9/2m5O2z5F9asqKqGAi3iPrEHjFiaTBY52b0ipMorFXLeRtBiz7RLyMy8gL7IXuCamccb4UH8u3H9Qb4TF5aOgHnQVStId1P5aB7Gk0r1WKi0KpSWnYM6iJBpc78beXJ3+KafthWsjQbYlTNa9FyNdFn6wvuVoIc78fBYfTgni2z/HrfBHS5bU1rrta9W4mZ+FyZNjMeb9nUgjvclLtjO6+rOlRns0oUWfgR1JOSh80IfwvEk7fyTblkX9xefHJgrOni7wFS0y8xxZy4sWgek1iS9mfU064wdaHHOmUavgeE6FJ2v621xuAf8BvWgLzgVkZp5HSng/9CI96uJNssfVj4Gq+Z09/ANbYVzEEIwOaoUgPyVKC/IxeHYfBHJy1wHRbHGh4iZOBwnt2wUhw7rgFluQIc3J8DfGwx2vx4bhq75koXwzGSV3+fFya/0rXx6RDNjAp6qokMpJ7YsR8W2DMUHOupGwPX2AWVqm+fz4v3SkM/8OjdEvOyCA/osdN2lRUssVaOYuoYEJXcyRnx2FcZMe3of3dnNDl0AnXLtQimultVAVVsK1rStKLpZReA1yacXITbeiL0p2/9+qK5CCAEyZFIqn+rQxGiyZMW8yXmHdSXUlm6zcJgVLoifqX8zSijzUZ3fCu93zeHxput7XtR0baVThYAYjUou0ndRRNOGno640MWF+Lh1c0W+QO7yKqpByiQk779i6n5bb+neHG3TX6Pho2p4G+oV38EgvN0rnjJJ9FbjC+h+lAm1IKH7Zpaaau4OsHSrcpKkv1+RpgHWN7p99pQl6Uqsle5G5y6vBMc5SdEf/jk5dPJoTIYXVrhe2HPsaWzYuMFz0vGh0S6noBr8K2lIW6Yra7mp0pW10j3Sm1zmyeGF2oskMm8YrAjXwH6iByw1HXMsRBJ0nUa0xTPMNKBrIS92VZ/4XgT1olVo0XpeK99D4Obqj1pUGkXW5/GTA6SZv8RXinn5euOP9WXj+IYOf7k6deQ6L+43F9nmhmDPvDWwJz8XXJ8tRdK0Cg2ew1eg3EbhkHS04VCCv1AUL/rMcd+L/io2Rhi0ejFTLzs3w3vosTvZzj2YgQdfNsjANG/iYOUNDNV5qsE5LIKOmATrvlGgfRJMy4pm5y+ev0lhTPLnmYxn+snx1adL4NOdOXESxbv7SNXwaCn/qiPnBtA1oeRryucGTN54Lz0b0TwU6MhrETqWtOKnlOLP7MMIWRGJFZH+siJ2B6duS8StZmyzhyhEo1eqnfKyzNHOiAZuGrAWcY340rjwX9yOKRzyPA19OwlJa0afxIOcMePDP7G/Tjk2wcc81Pjw3n+pEGPwwbWnN0Uu3G3YjIfxxdFMq0ZrmVc++/jy2UZ4blj+HMT35yQpHQemGFvRdg7c+eoXC/4YN8wfiMT93BPU6izV72dJUNZL3nOC2OZRmHMXkm73I+jcJMTP7k2AwrUkxNFSXnF63nFdR9nluu+Done64mD4DpE7r6ewxbsksYMlOJFxV8FJJnUSxLu8SWiDkzOccNeO6kOSXBvZlh08hlVt10+CXPWfR3IfT2jw/knhQxdXH6eXCikzr4xBBXRkkZUicnzgNJ288/fjjbNzAttAc4rYX1UteBFo0ueMd0+snkKozdabuIatvsJdNcspWHBK2nectHBWFSDyshJezjjz9uHhQZQeRFTl6ErbFhCN6Uhd00LVXIZZY/hV+HRFZkYwJUemIfLENH0WpRnJaIXdfdJL005jWaFYPunxie4SM6I/3Vhq2Xp6Jo+12K3OoDvKwMqYVfv1qFKIiR9GiUF8s3czaXC3pvS4I6x+AiFXToZq+HLHZ1BdayNN/QB9g5QZM2NMC4cyqLOWE+iYL/oBZ1dhA7WjbomfRTagTSiPWtcZtXLptWdJfXPZCflK8WM2rCv95cTNeWDWNdEIYWXwFV0NfTDRuY3pdLKW/ReXSy7ibP6aHHEUn2kIVOfERjrDCry2mZyZgq7AtkT59MIYW4w6QHrbmPGi1+OclZ3VyRxb6NbT9WemJjpmndO9GVeNM8lk0cdGNXUzx0Jbjhuuj2EMWkEP/8MULw3lLuFgWreVvHFYt2b8adKMutsCDDXx6NGtO5Uzltipr8y7h60y1aJJpzIXUk0i7mQazo54NAznF1f8CPqI4XXfwDwd0HTJbDaE4tzuO10dy8vVG6GC+Q7l68AIy/FuhXbsadDl+Aau+IpOcd1NM0R0goE/0INy4+2Px3FYY3G4YcRuAd2Y+ja5GfLN3hnincKQOogs/s2FWBg8y7wqutedXoH0BKF0XQGtobmwMwDm9fvQRqJC3iyeXR9c2Iu3YxBVvTq3Ev98upAEADfjZooew+k17Nd+eqsYqejl/HUdVgcmxfA6ai7cQNc2wtDSPXu5HR1d8+m8vNHvKC2EHb2DBs+THXDcXzG9DjUThhGmr3bF8Wgne/oK2l3Vj9a6z3NDK8AujVFhLBwWwyUHnYQo0Y2n1zgF9opRYvuAGUsmvxWRvLBhPitAKj/qkpjfOXmQd8zL1rfvZTYvm7Z1xagQDiZx3DXqM0M04W6jR4y0FTr3UBBlcYC06beSVWUmCB45FCxMcF+zZ5AJnwnxAuC4tR4tLZPbn8gkqbf+x6CLUiVmMh8/jjktz+nRVhfXDAvIP0gqMSdl77gYOi1oRwyz/N1qtftooYvJPyXj/ranw9+VBHTkxBC+syKLDKUhUH1uFCWO60LaHEfghyA2VO3fRi5b/xYShlQiIGoHupKPOETXWgvyH/BUJ57bBJWAXpkb6o5u3vtUZxow0QNa3Nm9BVSr1bVvpzodao8Uz74IhrzdB7+CtSMsci5HvvoENTy1E9yDQnu1QpMX7GZXR6IHL1x4jp09GzKCFiO8XCN/SbAS8NFQfrVlwN2yjLV9H4n/BT/QCe0QPFzz7wSykjlkOu68DMTgzG8WvhWNfn1qsflGNd04FoBnXDNzx2sfOWJZEg6cL0rh+EE0VJZSdIPAQ7il3ARtmFeOcGC8KZd6PDg/Bl6O+wvWhrkjYW4DPX2FtSWmEB0vL4gaGDsP4H5eQZa0VbTlwxZbEV3ULRuaYQ+GGn6NXoXtiK8K0AINfexF5CztzkwCG78tPzUP3fhRW2gHH4wNYFqRjySl8MWfjI3iEJoGDCf/iXuFICgnA6DkzkDlvC53A5Yz3Q1zh2bwG3gFdMCFuFUKLuqB471kELOjNKODR0N7oO+oDtE38CC9L5lVFlsTzeG71R1jD7YXnktXxhyzjehyb05aVsdgQxU8mvQM60VbHz2B3IBDdqC59OT5okG5SF5b49SPL1IK3V6OYLHR4bSIO0busSLeGhxVWRXka8if5lJTpKxyPfMsRlY/Ie5qtpDM/Xb5CHnp5o23PsyOQ0HeRrk47UZtRIrBN3fJi4JFoE13GC8tmWtQ6xBAuad7PION1b7RoW3855cyomUfxUngmfiZMp8fMQFciSlNhjrbCPxj7x2yEZ8BRdEMBQj+bQa1c7Iz1QVelC56f5I9p1Cdu9ef7aEcnZyTM/R6h60FbY32QkNQfzv72ddA15NF6CG1bOrkOPgEHEdavAAml/XH8uwAUHU9ETmRf9KeJPHPNQvsiIDIFmVEjiXcluB0mbn5Yn/giPIfsQO/M0dJ5urXD5JACPN1kHG850GUtVCF71NenW0usG/Mj/MJjMbj0LGE+Vr+EpNSvkotTsvbOy5RxO/bFzrnS+qtPoCg/oq7PW8cX+7GclwtGfNwLvSesRph3JY2laJsYS0B8/y0oBj5RbiiLDmY+5KzLOhdFL7d8/MHP9QK+qcIosi7yjra60TtOfx30AaLJQoXDZ0lGpiNUNzTRRTL7UfgF49cF8WhOEyBBrjw4fRaER3rMIj/qViMnYivbgszat5CdgAdZX7O3bUDf6FZkBS/Ah7GTSb+ayqJZthY8HFGdm2rWv1aJdONYSqnnwQY+FX7dkLG2BM8HzULAa6E0wjb0zRaYMfK2KygoMLHJGMLtaID660Eyvw92gfL0p1D8ToMRK07bsj803d+1EkMIIutAZQ2cXXl1J/iyX5VKhbIyfkVG7C/ct2/fXrj9///SkVhqrRPu0op39+Wg1dFKrR1cde+qGBFkYRo6fduNDSbq72rU7BAAO3pXR5jY1uDX1bSUMKQJBnRwgOZyGaLeUGPWruYIEKqR8tLQHnqlbTJIixoN47H+pSG7YOVJPjrhdJvwcHKTEHtrYfXNzM4eDsqOpPsU+O6Vkfh66BrsfY0fVNWXxAMfr5a+U3PrguVjnbPiaUvQMZoTi+qA9jSzl/f1zo7krimtBnZkqrG+rhZqWhlypi0Yekd7ndU1DuRnLP/q3HP4cBcw6/XOqEo/BL9lSlTF9bFRffK5NJSWWlNtzKueaUs3rHy0eGFSFkuxmb/qVhW0CiW8bWz/1mjaHkZ8k15wFvREHQS0hAu4bTR1RLQaLCEL4vgmcpG9Lwlb0ZlOi/TG8diNWOz0DPeuCEui1tTWgXkdeYnzZfRy0zDl47Nw5baz3UalVxfEzOpm3eJPK+mqihp4uIlk24Su8GiJX0v+XDoTPARatv7aLtO25SBF3zZ5qcIy2o46MH4anlDwcmbgwDY5ZdYNa3LN+NLSu1F1yj1ttdoV/S1+DH4Ja4bzi8BHVq7GngGvYn4PBfXDbEuZwdWbLiXR0mFCKmp73k30I1wDIRvuTPNU36LDU17egE5fTcc4bmtj3cQYDbY9zjZnW9uyjbZJbGoDWrbt0sTb0qOULFqKK+1Pr2Lc0tD6jAs86pspI8TaKsmEsVwxnOrXN5jWpRRv2Yn7MHPPLbRg224qVWjZswMuHbpqrrNs1hv14JMO5lm27AKGvxOCjtpcvPxYChZlvsItHJjyqvXtjsKyLvDx9YEdjRm4q76TGlNif9TzAzWp+aNAuE/pZm0uRPSXWs4ixL6R2PktH7w1xtYZTOMUTuExFHv+2RPD/nkSWtXeOonqJzV1xrzLCPpJjR1+mL0St197By8/asE8f5dZ3dfJqaN2uJVF02LRxOW+Ypi+GRC7F98kk3WxWRDef+dJeifF1g5XKFBj0hJoyr/3FIFbtJ1jZTIOZBShRd8QLIjshta2DDTuKbNyZg1HgE5WSsxCu9DOqLcRreGZ1Stl9j4aQJ5sjvWiiW0ufavqSutOZFFpqE6qV9YNjETHDS+Pp4NBBuETZlWVnYxAoyJQizP7krFs80Xk0VLPG5FDEd6Ds7Ob5SJPaswgkT1sRYBZcCo0d2jFxYEsQ7ambpz4woRGoFafic09m9QQUw7OfyFLDVvi+HM7O3UxHOj4StnJCMgIyAjICMgIyAjICDQmAlKTmnqtRdm7Ge9rb0ymTGnVqEvo1fcbpt76Z4VHd/29fHPvEVB4sL2p/1/HLDRiJ1hsxH6m92wiJLt7jADJisnLVfeYATk7GQEZARkBGQEZARmBhxEBbgJTpnv/W1fAek1qHkYw5DI9uAgwy4zsZARkBGQEZARkBGQEZARkBGQEBASM354VfOVfGQEZARkBGQEZARkBGQEZARkBGQEZgQcEgXswqbmNlA0xSOI+dsKjcv3sfsR8/rmR3wOCl8ymjICMgIyAjICMgIyAjICMgIyAjMB9hoCVSQ2dWySc5ns3TJdl4khxcwS3498qzz+0Dt/9coUOpKNjdmuED2LdTQZyWhkBGQEZARkBGQEZARkBGQEZARmBPzMC9nfobGepi85ibRSXk3oErsGPo6mOWpOgUXgzcjw60eFQpt9qbZQMZSIyAjICMgIyAjICMgIyAjICMgIyAn8qBOzZVyTEl1D6Rvm6RM11HEmvxuBB7ZC/fx1256jh1rQpfS2WPtJI372SnYyAjICMgIyAjICMgIyAjICMgIyAjMDdImBPn+CE+BKsNszvzl2aa9RX0nEdPtDk5eBCURWKLmWj4m45ltPLCMgIyAjICMgIyAjICMgIyAjICMgIiBAws9QIFhru9y63oNl7tEFwkDeuZZzDtZJqlBX8jvLbotzlWxkBGQEZARkBGQEZARkBGQEZARkBGYG7ROB/I9v+n2P+z8QAAAAASUVORK5CYII=" alt="" width="1057" height="32" />
原因是在iOS10之前CAAnimationDelegate是基类的分类方法,然后在iOS10之后变成了独立的协议方法,所以不遵循协议,就给了警告。
所有应该这样做,下面语句除了判断__IPHONE_10_0
宏是否定义,还判断了当前系统的版本是否是大于10.0的
#if defined(__IPHONE_10_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0)
@interface ViewController () <CALayerDelegate>
#else
@interface ViewController ()
#endif
@end