From Swing State Project I found the Obama/McCain results for every PA House district.
Here is the analysis and a link to all data.
Obama's best:
district Obama McCain
190 98.90% 0.96%
201 98.05% 1.73%
191 96.99% 2.80%
197 95.99% 3.67%
192 95.84% 3.98%
All are in Philly (191 also extends into Delaware) and are all majority black.
Obama's best among white-majority districts:
Location district Obama McCain
Philly 182 83.63% 15.44%
Philly 202 83.08% 16.33% - plurality white
Philly 175 80.60% 18.37%
Reading 127 78.32% 20.30% - plurality white
Pittsburgh 23 77.12% 21.92%
Philly/DelCo 185 76.57% 22.82%
Lancaster (city) 96 74.87% 23.71%
best McCain:
dist Obama McCain counties
78 26.84% 71.75% Fulton, Bedford (pt.), Huntingdon (pt.)
86 30.99% 67.64% Perry, Franklin (pt.)
80 31.52% 67.24% Blair (pt.)
90 31.83% 67.24% Franklin (pt.)
69 31.05% 66.89% Bedford (pt.), Somerset (pt.)